Another Nicholas Cage vote. A brooding facial expression does not make up for a complete lack of acting ability, he is the same in EVERY movie. I actually avoid anything he is in.
Renee Zellwegger - I think she's God awful, all she does is pull this grimace expression and that annoying baby voice.
Natalie Portman, started out with great promise, but have not seen her shine in anything since her younger years.
Jude Law
Eric Bana, partly because he has the most enormous ears ever - you should see him in Troy, also I thought he was really poor in both that and Munich.
Colin Firth - don't get his appeal at all, and yes I've seen P&P I just don't find him attractive at all, he's so ordinary and non distinctive.