I'm kind of in love with Jeff Goldblum. Sure, the fact that the guy is super handsome, tall, and has a great head of hair helps. So does the fact that he was the lead in one of the most terrifying movies I've ever watched as a child.
But it mostly has to do with the fact that in all of his roles, he seems to play the guy who always knows better. Always one step ahead of the other guys, always the person who has a problem with something and is ready to say, "I told you so." And he does it perfectly, because the guy's super intelligent.
Mostly when I enjoy his performances, I don't think about any of that, because there's no way I'm going to out-think the always pensive Goldblum.