I don't know if you're looking for more recs or not. But if ever you are:
- The Nokdu Flower : I haven't finish it yet, because when i started it it was a very bad timing for me, and i'm waiting to forget most of it before rewatching it (but i only had few episodes left). It's the best historical drama in my opinion. It's more about the people than the royalty. It has an intense story, you're never bored, always something new happening. And you're following basically two brothers who are on differents side. It kind of remind me of Bridal Mask/Gaksital in some points. But i definitely recommend Gaksital too.
- Moment at eighteen : a coming of age high school drama. It easily go from dramatic to adorable, which may be frustrating sometimes. But realistic characters. I really loved the way it was filmed, which made me feel like i was there but invisible and just watching our characters going through a lot of stuffs.
Also you said you liked short kdramas, so :
- Just dance : Kind of a slice of life/coming of age high school drama with kids joining a dance club. It's short, cute, but i'm pretty sure i cried a few time.
- Girls Generation 1979 : high school drama happening in 1979. It's good too ! Cute !