It was a fun flick but consider the PG-13 rating carefully. Younger kids could be scared by the excellent special effects and realistic appearance of the mayhem depicted in this film. Of course, these are the reasons why we older kids go to see movies like Iron Man.
Robert Downey was perfect as the somewhat egocentric (ok, he was completely egocentric) Tony Stark. Gwyneth Paltrow was the perfect administrative assistant for the eccentric Stark. Plus, she looked great! Jeff Bridges was appropriately slimy but I won't give away the plot and say why. Terrence Howard was your basic decent guy and friend of the hero. His role in the military gave him a bit more clout than the usual "loyal friend" but that worked out all right in the end..
The stereotyping of the villains was a bit predictable considering our current geopolitical situation. Tony Stark's forced awareness of world conditions was handled pretty well.
What I didn't expect were the elements of humor that kept popping up in the course of the movie. There were some cute moments between Downey and Paltrow which helped keep the characters interesting. Downey's final line in the movie was perfectly in line with his somewhat rebellious character. If you want to know what it was, you'll have to see it yourself.