Ha, interesting. Well, okay. Here goes. This feels weird voting against things I liked in some categories. But some of these I truly dislike, so I'm glad to vote for those, I guess :)
Family/friendship romance: Coffee Prince, What Happens to My Family, Reply 1997, and What's Up
Action/thriller romance: Time Between Dog and Wolf
Action/mystery/suspense: Remember-War of the Son, Last
Medical romance: Descendants of the Sun (man, that's a hard choice. I dislike so many of these, haha)
Life/school: Late Night Restaurant
Supernatural romance: You Who Came From the Stars
Detective/police: oh that's really not fair; I like everything I've seen from this list...I suppose by my score alone, it's Missing Noir M even though I love it too
Historical: Inspiring Generation, Warrior Baek Dong Soo, Queen In Hyun's Man, Joseon Gunman
Romance melo: Angel Eyes, Mask
Romance comedy: Modern Farmer, The Producers, Plus Nine Boys, Soulmate