Alright so first thing you must know is that I am a huge Iron Man fan and I have been for years. So I knew the source material. This movie stuck very, very close to the original comics, only tweaking a few things to allow it to fit the screen. There were plenty of things that would make us nerds leap for joy, plenty of little easter eggs for the comic book fans.
Even if you're not a comic book fan, The movie was great, and lived up to the hype. The acting was great. Robert Downey Jr. IS Tony Stark. He just brought the character to life. Terrance Howard and Gwenyth Paltrow really do an a amazing job as well. The special effects are seamless and incredible, as one has come to expect from ILM. The Movie is filled with Humor, but not cheesy humor that ruins the movie. It's also filled with a lot of great action, action that is more than just watching things explode.
Really this movie was great on every level, and is a movie that anyone can enjoy for multiple reasons. If you do not watch this movie, you are missing out.