I would say: 1) Adam Sandler - He ruins some potentially good movies for me, like Click. I don't like his humor at all and he's usually rather monotone. 2) The girl that plays Bella in the Twilight movies. Her facial expressions look the same in EVERY scene. And that expression is bland. 3) Rob Schnider- I don't like his humor, either. Also, his laugh is annoying to me.