Just back from watching Iron Man with my friend John. We agree it's one of the best superhero movies ever. Robert Downey Jr. makes you care about Tony Stark as a flawed man trying to atone for past mistakes. His natural delivery makes the jokes better and steers the emotional moments away from melodrama. In short, you hang on his every word. The supporting cast (Jeff Bridges, Gwyneth Paltrow, Terrence Howard) likewise bring the full weight of their talents to their roles.
Despite major star power, Iron Man features the attention to detail more common to pet projects. It's the rare superhero movie that raises the bar.
Be sure to stay through the end credits.