And, more importantly....because IRON MAN is the best single superhero movie EVAR!
Trust me on this one. They nailed Stark's personality spot-on. The dialog kept me laughing for half the movie, but it didn't detract from the storyline or the kickass action scenes. The commercials, things I usually despise because they show you all the best parts of the movie, only spoiled a few jokes overall. Actually, they even lead you to believe a few things that the movie twists around and surprises you with - a rarity in this day and age, though those twists in question admittedly weren't the biggest surprises in the world. Killer soundtrack. Fantastic special effects. God, I can't say enough good things about this movie. (And after Ghost Rider, I was glad to see Marvel bounce back with it's best film yet. Yes, better than X-Men or Spiderman or what have you. It's that damn good.)
Seriously. Turn off the computer. Get off your ass. Go see this movie NOW.