Eh. Meh. It was okay, but honestly I got a bit bored. It all felt fairly generic, and I really felt nothing for any of the characters nor their connections to each other. The best part about it was Tommy Lee Jones. Oh, and Hugo Weaving's forever-mesmerizing eyebrows. XD
As boggling as it is to say this, I think I liked Thor better than Captain America. At least with Thor it was (unintentionally) hilarious. (Douchebag vs. emo genocider IN SPACE? What's not to love? XD)
Having now seen Iron Man, Thor and Captain America, I've determined that I don't care about two thirds of the characters in The Avengers movie. Basically I'd like another Iron Man movie, please.