230RN, I'm exaggerating a bit here, but I've just never been able to stand him as an actor. He could be a great person, I don't know. His on-screen personality really turns me off, no matter what character he plays. In the remake of "The Taking of Pelham 1-2-3" he was well-suited for the role of a loathsome bad guy.
I feel the same way about Sean Penn, although he's probably done more to deserve being disliked that Travolta has.