They aren't in order. All of these are amazing stories with incredible acting, setting and ost.
1)
Moon Lovers: Scarlet Heart RyeoI fell so much in love with this drama that I looked out for the original chinese novel, unfortunately there are only a few chapters translated to english.
2)
The Princess' ManThe Korean version of Romeo and Juliet. Epic and absolutely perfect.
3)
Fated to Love You (Korea)Funny, sweet, sad, lovely. Unforgettable couple.
4)
Dong YiBeautiful story!! Strong characters. Just finished it.
5)
Secret In a tie with:
Queen of AmbitionIf you want to watch a melodrama these ones are for you, heartbreaking stories with great turns