What Korean dramas I missed in 2015?

Some Dramas you can check out for 2015!
- Mask
- Girl Who Sees Smells
- Kill Me, Heal Me (Though i see that you've placed it on hold)
- Angry Mom
- Healer
- Fool's Love (Can be a little slow at first but the plot twists are WOW)
- School 2015 (I heard it's good but have not watched it)
- Falling for Innocence 
- Oh My Ghost
- Yong Pal
- She was Pretty
- Oh my Venus

On-Going dramas that you should check out!!
- Reply1988

MOAR: 
- Hidden Identity
Reinforcing:
- Healer
- Oh My Venus (So Ji Sub & Shin Min Ah as couple, damn it)
- Kill Me, Heal Me
- The Girl Who Sees Scents
- I Remember You

Splash Splash LOVE (It was a two episode special, but I thought it was really well done and highly recommend it!)
Noble, My Love (It's 20 episodes, but each episode is only 15 minutes. It's kind of like a silly, cutesy endeavor and I really enjoyed it)

I'll echo what others have said about Kill Me, Heal Me. It took me a bit to get into it (and I see you put it on hold after episode 5), but it really is one of the best constructed k-dramas I've seen in 2015.

And Healer was more 2014 than 2015, but I see you don't have it on your list and I agree with others, definitely something that is a necessity to watch.

The Lover was funny and is a shorter drama with episodes around 45 minutes.

@JPT Angry Mom is definitely worth watching! Honestly.. i though the concept of a mom going to a high school was going to be totally ridiculous but it was amazing! Kept me at the edge of my seat.

Plus reallly splendid acting as well. I really enjoyed Ji hoo in the show as well.. Totally made me fall in love with him XD

Healer
She Was Pretty
School 2015
Falling for Innocence
Ex-Girlfriend Club
Oh My Ghost
Kill Me, Heal Me
Mask