Enjoyed Iron Man and Iron Man 2.
Didn't watch Thor.
Never saw Hulk or figured out why a month later there was another, different Hulk movie.
Watched Captain America with indifference.
BUT I SURE ENJOYED The Avengers! What a great flick! Shocked, really that it was as good as it was. Funny, I couldn't place Thor throughout the entire movie, but I knew I knew his face - freaking Kirk's Dad from the Star Trek reboot.
Seriously awesome, and I'm quite stingy on my time for, let alone recommendation of, movies.