I finally watched the movie today and it was simply incredible. Ruffalo is the best Hulk yet, Hiddleston topped his performance as Loki from the first movie, and I came away from it with an even bigger appreciation for Downey as Iron Man. I loved Hawkeye's role as well.
I was reading an earliest post, and it's good to know the DVD will have extra footage that focuses on Cap. Like everyone, he had his moments in the film, but not enough for my liking.