Hmm, I see that for the majority of people here that the judgments are being based purely on the movies. I am an old school comic book guy. For that reason I voted for Tony Stark.
And really, some of you have never heard of Iron Man before now? I don't see how you missed it between comics, video games and action figures.
I mean, Bruce Wayne is cool and all, but his whole hero motivation is that his parents were killed when he was a kid. Someone needs to take off the padded rubber and seek some therapy.
Tony Stark's motivations are to atone for his own mistakes.
Plus, Tony Stark has real character flaws, like alcoholism, that you find in rich people. What's Bruce Wayne's character flaw? Being moody?
By the way, the alcoholism was pointed out in the movie. Aside from constantly having a drink at hand Rhodes even made a comment about him being an alcoholic. They also hinted at the War Machine storyline, which is the result of Tony's alcoholism.
Plus, Batman's villains were always one or two psychotic guys at a time. Iron Man takes on entire armies.
As for not getting why people like Superman; he represents all that is good and just. Also, remember that he didn't start out as this ultimate, nearly invincible being. His early story lines had his powers just being a semi-scientifically justified superior abilities granted by being from a planet with stronger gravity. He didn't fly, he didn't have heat ray and x-ray vision. He was strong, fast, and could jump really high. He seemed invincible because if you have super strong muscles then they will have to be supported by super strong skin and bones. All that other stuff came along as TV shows and whatnot happened and DC incorporated it in using our different kind of solar radiation as an explanation.