This might sound odd, but I'm in the mood for a drama that will really suck me in with how dramatic it is. So I'm looking for series with characters/stories that are super dramatic and crazy.  I'm not picky about country or genre, so don't hold back! :)

I don't see CRUEL CITY in your watched list! Must watch!! fantastic and just what your looking for
Gap Dong
Defendant
Zeni Geba
Maou
Orthros no Inu
Ouroboros
Holyland
Kazoku Game
Suzuki Sensei
Aozora no Tamago
Iris
I Remember You
Tunnel
Empress Ki
Save Me (currently airing)
'Duel' ( for Sci-fi )
though if you wanna watch a crazy and dramatic story with evil women that ur mind and soul will love to hate.......... Watch ' Band of Sisters'
I second, Duel, I Remember You, Save Me, Cruel City, and Defendant!

Signal (detective, crime)
Liar Game (psychological)
Remember: War of the Son (revenge, law, crime)
Secret (2013 kdrama, revenge, romance, melo)
Byakuyako
The quiz show 2
Voice
Que sera sera
Kuzu no honkai

+1 Kazoku Game
+1 Maou
+1 Soredemo Ikite Yuku
It's okay that's Love

Beautiful Mind

Love me if you Dare

These are not very extreme though lol
Save Me
Secret
Cruel City
White Christmas
Kill Me, Heal Me
The Quiz Show 2
Ningen Shikkaku
Death Note
God's Gift - 14 Days
Hanzawa Naoki
LIFE
Last Friends
Who are You - School 2013
W
Zeni Geba
Bridal Mask is high stakes and had good cliffhangers.

On the other hand, if you don't mind your dramatic with a side of eye-roll, then maybe Baker King, Kim Tak Gu.  Fairly cracktastic, also kind of insane.  If your mood is more soap opera.  It's got characters and a plot that's crazy, for sure.  Good or bad is up to you, haha
Thanks for the recommendations! There's some really interesting titles in this thread. :)