Cheese in the Trap -- I found this awesome in so many ways; of course the controversy surrounding it and people's reaction towards the ending are not that nice but you must give this a chance, I really think this is one of the best dramas.
Descendants of the Sun -- very entertaining in my opinion, there was great chemistry between the main couples, the OSTs were really good and the acting was even better.
Missing You -- maybe not my top drama but it's good if you're up for something heavier. It's a melodrama in it's truest form, I think.
And I know this is not exactly a drama, lol, but
The Beauty Inside is a really amazing movie!!