The entire thing was amazing, and it was probably the best movie I have seen since the Lord of the Rings came out, no joke, I cannot think of a movie I have enjoyed more since then, and I wasn't even expecting The Avengers to steal the year for me for movies, it just might.
Every actor played their role phenomenally, and each time a character had their time to shine they really did shine. The humor actually really helped the movie because it kept you engaged while there was a grimness as well during parts of it. Everyone was awesome, especially the Hulk, he didn't have many moments, but his scene near the end was perfect and amazing and had the entire audience cheering.
This movie is everything I expected and more.