I second Love Shuffle and Gods Gift - 14 Days. Vampire Prosecutor and Surplus Princess (it's so sad that it was cut though) too! 

If you're up for absolute insanity, I would also recommend Manhattan Love Story! It's just... Bizarre. In a good way.
Very useful thread! I'm bookmarking this for future ref. ;D

Many of the recs are indeed unique and my faves. I second these in particular:

N no Tame ni
Love Shuffle
I Hear Your Voice
Karamazov no Kyodai
White Christmas
Nine
Liar Game (J-ver.)
God's Gift
Vampire Prosecutor
Manhattan Love Story
Long Love Letter

I'll add Yakou Kanransha, MR.BRAIN, It's Okay, That's Love, Biblia Koshodou no Jiken Techou, God's Quiz and Reply 1988 to the above suggestions.

P.S. I was going to include Kazoku Game too, but I see you've watched it already.


For me, this is worth seeing:

Japanes drama:
Pride (2004) http://mydramalist.com/491-pride
Natsu no Koi wa Nijiiro ni Kagayaku (2010) http://mydramalist.com/15-natsu-no-koi-wa-nijiiro-...
Hana Yori Dango (2005) http://mydramalist.com/2983-hana-yori-dango-2005
Hana Yori Dango 2 (2007) http://mydramalist.com/2984-hana-yori-dango-2
Ando Lloyd - A.I. Knows Love ? (2013) http://mydramalist.com/7942-ando-lloyd-a.i.-knows-...
Koizora (2008) http://mydramalist.com/7942-ando-lloyd-a.i.-knows-...


China Drama:
Boss & Me (2014) http://mydramalist.com/8996-boss-me
Scarlet Heart (2011) http://mydramalist.com/2969-scarlet-heart
Scarlet Heart 2 (2014) http://mydramalist.com/4537-scarlet-heart-2
Cruel Romance (2015) http://mydramalist.com/8963-cruel-romance
Palace: The Lock Heart Jade (2011) http://mydramalist.com/1480-palace-the-lock-heart-...
Perfect Couple (2014) http://mydramalist.com/8963-cruel-romance
Cuo Dian Yuan Yang
http://mydramalist.com/8082-cuo-dian-yuan-yang
Prince of Lan Ling (2013) http://mydramalist.com/4033-prince-of-lan-ling
Sealed With A Kiss (2011) http://mydramalist.com/3395-sealed-with-a-kiss
The Journey of Flower (2015)
http://mydramalist.com/9219-the-journey-of-flower


South Korea:

49 Days http://mydramalist.com/288-49-days-2011
She Was Pretty http://mydramalist.com/15055-she-was-pretty
Secret Garden http://mydramalist.com/8-secret-garden-2010
Secret http://mydramalist.com/7761-secret
Shine or Go Crazy http://mydramalist.com/11646-shine-or-go-crazy
Scholar Who Walks the Night http://mydramalist.com/11844-scholar-who-walks-the...
Sorry I Love You http://mydramalist.com/1146-sorry-i-love-you
Blood http://mydramalist.com/11350-blood-2015
Witch's Romance http://mydramalist.com/9260-witchs-romance
A Moment to Remember http://mydramalist.com/164-a-moment-to-remember
D-Day (2015) http://mydramalist.com/14086-d-day
The Greatest Love (2011) http://mydramalist.com/1548-the-greatest-love
King's Daughter, Soo Baek Hyang (2013) http://mydramalist.com/8100-kings-daughter-soo-bae...
Queen In Hyun's Man http://mydramalist.com/3985-queen-in-hyuns-man
Kill Me, Heal Me http://mydramalist.com/10873-kill-me-heal-me
Tree of Heaven http://mydramalist.com/274-tree-of-heaven
Who Are You http://mydramalist.com/7327-who-are-you-2013
Prime Minister and I http://mydramalist.com/8129-prime-minister-and-i
A Millionaire's First Love (2006) http://mydramalist.com/34-a-millionaires-first-lov...
K-POP - The Ultimate Audition (2012) http://mydramalist.com/3929-k-pop-the-ultimate-aud...
Coffee Prince http://mydramalist.com/2982-coffee-prince
It's Okay, That's Love http://mydramalist.com/9289-its-okay-thats-love
City Hunter http://mydramalist.com/1702-city-hunter-2011
Hyde, Jekyll, Me http://mydramalist.com/11514-hyde-jekyll-me
Padam Padam http://mydramalist.com/2937-padam-padam
Hong Gil Dong http://mydramalist.com/119-hong-gil-dong-2008
Heartstrings http://mydramalist.com/1445-heartstrings
Love Rain http://mydramalist.com/3057-love-rain
Ugly Alert http://mydramalist.com/6827-ugly-alert
When I'm thinking of unique, She was WOW always comes to my mind. I really enjoyed this drama, as it was different from those I had seen so far.
Did no one mention Once Upon a Time in Saengchori?  It's kind of a wacky comedy-mystery-workplace drama that's actually pretty unexpectedly touching in parts.  But really different from nearly everything else I've ever watched.
I don't know what classifies as unique, but I'll just tell you the ones I watched recently that were just absolutely amazing. 

- Nirvana in Fire (Chinese historical drama with an amazing plot line focused on revenge, the whole execution of the drama was just mind blowing except i guess the con of it would be that its extremely long with 54 eps, so if you decide to start, prepare yourself )

- Gu Family Book (Korean historical fantasy about mythical beings, I loved the story and whole fantasy element, it was very touching. )

I think you can try watching The Master's Sun.. Although only watch if you are okay with Horror! and there are splashes of Horror here and there.

It is a poor woman and rich man but.. It is definitely a different drama and is unique. I felt that the story was original and it got me hooked from the start. 
Hello every body.

After watching nirvana in fire, I recommand Yuzarsif. this is a synopsis of the story: 

A child who escaped death from the hands of his own brothers is back.  I invite everyone to see a story of hurt, of compassion, of love that you have never seen before as you follow Yuzarsif in the fulfillment of his destiny!

Welcome to a journey of adventure, from a shepherd in Palestine to the prime minister of Egypt with its political struggles with the corrupted monks.

Come see a story of a matchless revenge that will make you cry, laugh, smile and envy as you have never taught capable of.


you can watch it on youtube here: https://www.youtube.com/watch?v=oqQrcyIOBvo&list=P...
IS: Okoto Demo, Onna dewa Nai - a school drama about ... an intersex student struggling about her gender identity. 

Soredemo, Ikite Yuku: a terrible child murder occurred...years later the sister of the murderer and the brother of the victim meet again...

White Chrismas : 7...or 8 students decided to stay in their school for the holidays in order to find out who is trying to threaten them...and they all think it's one of them, but who? 
Who Are You: School 2015, Thats a veeery special drama if we're talking about OSTs, No Joking!! Every single OST of this drama is just awesome. The story is also very exciting from the very beginning to its last episodes.. you may find it a bit cliche in the first episode because of the bullying thing (tough it's only natural coz we're talking about a scholastic drama) but it will take a very different course than the usual after the 2nd ep,. i think... :D The drama's only flaw to me was its love story, i would've prefered if it stayed just a friendship relation instead.. anyway, the drama's very worth watching.
The Princess' Man.. "Korean's Romeo & Juliet".. i've never seen R&J's play nor completed its story before.. but from what I know about it, it's so similar to this drama.. not only about the story, but also about its uniqueness.. i'm not so into historical dramas but that one is somehow different, and it's one of the best kdramas i've watched so far.
One Litre Of Tears: That drama is a most! You have to definitely watch it.. and I advise you to download it because you'd want to rewatch it a few times ^^.
King2Hearts, Hmmm This one is really different, i've never seen another drama with such a plot. To me, it was the best drama of both Lee Seung Ki and Ha Ji Won (its main actors), their roles fitted them just perfectly.. And all the other characters were amazing. Its OSTs were also so good that I still listen to them from time to time. The only thing I couldn't and still dont understand about it is the title :D
I Remember You, I saw this on your plan to watch list 'n I advice you to make it your priority when you want to watch a new drama.
It's Okay, Thats Love: that one is unique as a different romance, unique strong main characters, unique mature discussions (btw, they are really mature, i mean, literally XD), and a unique plot of course.. and, again, great OSTs
Reply1997, Reply1994, Reply1988... Nothing to say, just make sure you watch these series in that order.
Just one last recommendation :D
Nine: Nine times time travel: Just watch it .. and make sure you concentrate 100% while watching it.. you'll need every single bit of concentration you have.
That's it, I hope you'd find time to watch all these dramas.
White Christmas is one of the best dramas I've ever seen. Super unique in my opinion. Maybe Vampire Prosecutor? 

Oh and I'll also agree that the Reply series are pretty unique and unlike anything I've seen so far :)
IS - Otoko Demo Onna Demo Nai Sei.
It's a jdrama, and the first drama that came to my mind. To my knowledge, the theme is pretty unique as I've never seen dramas talking about Intersex before. It's not romance, not comedy, not overly tragic either, really not your standard, average fairytale drama :P
Also, both leads are really good and the drama overall is really great (personally, one of the few I awarded a 10/10) and reflects well on the issues the main characters encounter. 
Lol It seems you just started dramas so of course we have many recommendations for you ^^
But really, just start from your PTW list with Nine : Nine Times Time-Travel . This one is not a police drama like Signal, it's a romance one, although there is some mystery too.

If you want something new for your PTW list, here are a few rec. in complete disorder :
- I Hear Your Voice : he can read minds, thriller, noona romance
- You Who Came From the stars : love-story between an actress and a 400 years old alien
- Guilty Akuma to Keiyakushita Onna : police drama about a serie of suicides
- Who are you : police drama with a cop seeing ghosts after a 6 years coma
- Painter of the Wind : period drama about royal painting
- Kill Me, Heal Me : romantic comedy about personality disorder
- Ma Boy : cute gender-bender in 3 episodes
- Bad Guys : investigation drama, darker than most dramas