Actually, I was pretty happy with IM2. My biggest issue with it was the fight between Tony and Rhodey. I thought that Rhodey's behavior was very inappropriate.
Other than that, the Iron Man movies reminded me of the Keith Giffen
and J. M. DeMatteis
Justice League International because of the great humor in it.
The first Iron Man movie would be my favorite comic book movie of all time, even though the villain is pretty one dimensional.