Bride of the Century is sooo good. I've also seen and recommend Gu Family Book, Scholar Who Walks The Night, You're All Surrounded and I Remember You. By far my favorites right now and I'm super picky.
Welcome to Vingle!😊 My first Kdrama was Boys over Flowers and it still remains one of my favorites. I would recommend "Playful Kiss" because Kim Hyun Joong (Ji Hoo)is also in it. Another must watch is "You're Beautiful" and "It's Okay It's Love"