This was the first time they really nailed Hulk in my view, he was incredible in every scene he was in and pretty much stole the show. The build up to him first transforming was really well handled, the other characters are just goading him and egging him on and he's trying to contain it. The part where Hulk is ragdolling Loki was absolutely hilarious. Mark Ruffallo was brilliant and he and Robert Downey had a great chemistry.
I found the movie so much fun, so many great laugh out loud moments and one of the few occasions where I genuinely thought the visual effects added a lot to the movie. I found my heart racing all throughout the action scenes. I was really impressed with the outer space sequences, really great looking visually.
so glad Banner and Stark got to nerd up. it's been a long time coming. if only Spider-Man could join in. D: