Antonin :
You've got so much good stuffs in you PTW list
Classics : Coffee Prince, The greatest love very addictive, heartwarming and both really classics of kdrama romcoms.
Fun : Juhan Shuttai, Tamiou Jdramas know better how to make comedies that give you back the will to live.
A bit more adult : Drinking Solo, The Lover, For me those two are really different from classic kdramas, its more realistic, touching than other ones, and features a more adult vision of life and relationships.