I really enjoyed watching The Incredible Hulk - good story, character development, humor and action. It's no Iron Man, but it still holds up as a tasty piece of the Avengers pie.
I think that it is incredible that a movie studio is taking a long-term view with the Avengers series. Sure, they could screw it all up with one bad movie, but so far, Iron Man and The Incredible Hulk illustrate some "integrity" and dedication to doing it right.
I also have to add [cameo spoiler alert]....that I really loved it that they gave Lou Ferrigno a cameo roll. I just about lost it in the theater when I saw him. And in another reference to the TV series, it was great how they put a spin on Bill Bixby's well known line, "Please don't make me angry. You wouldn't like me when I'm angry."