Eternal Love! It's a chinese drama, though!
I love Seven Day Queen or Queen for Seven Days whatever hahaha.... now my all time favorite!!!
Cheif kim
Weightlifting Fairy Kim Bok Joo
for now lookout aka the guardians
1.Chicago Typewriter - I am so in love with this masterpiece.
2.Chief Kim
3.Kleun Cheewit(Thai)
So far:
Chief Kim
Lookout (which is currently airing)
Suspicious Partner!
So far, it's Defendant.
I cant pick just one!....so far I've  loved Mystery Queen, Strong Woman Do Bong Soon and Forest of Secrets 
Rebel, chicago typewriter and princess agents
My favourite romance drama is W and Descendants of the sun
romance: Strong Women Do Bong Soon
non-romance: Duel
My fave (so far) is Chicago Typewriter, with Tunnel as a close runner-up.  :)