Tom Cruise sucks because he doesn't know how to act. Sure, he's a handsome lad, but remove a clenched jaw, steely gaze and a dimpled smile from his bag of tricks and all you have left is Shemp Howard (from the 3 Stooges).

Did you see Magnolia?
I mean, did you watch it?

Watch Tom's eyes. Watch how they remain fixed on some imaginary point in space. No matter who he's talking to, nor how emotional he gets, those eyes remain as focused as mine do on the computer screen when I'm checking out the porn on the Internet.
What the hell is he looking at?