Ha Ji Won, I hate her with a passion and everything about her and her acting annoys me.
I think Lee Min Ho can't act, and has the charisma of a piece of wood.
Hwang Jung Eum. She screams and screeches in most of her dramas and she tends to be over the top. The only drama of hers that I loved was Kill Me, Heal Me and that was in spite of her not because of her.
Lee Dong Wook. I don't hate him and actually like some of his dramas/characters but think that he's a bit overrated for his acting skills. It always feels like he's sleep-acting and mumbling through all his dramas.
Jang Keun-suk. Don't understand why he's popular in the first place. And yes I've seen You're Beautiful.
Lee Byung-hun. HATE HIM. Even from before I knew of all his scandals.
Song Seung-heon. Can't act.
Hyun-Bin. Don't hate him or his acting but have yet to love any of his work or love him in any of the roles I saw him in.
Suzy. Obviously.
Joo Won. Meh
Park shin-hye. Meh
Kim Tae-Hee. Meh
Moon Chae Won. Meh