I'm sure someone will complain that there favorite isn't here, but i think I got most of the cream of the crop.
Which one is your favorite and why?
While its still fresh in my mind perhaps giving it a bias, I'd still have to say Winter Soldier was my favorite. It felt like a solid James Bond movie in the Marvel universe, and its nice to see The Falcon in action as well. As a kid, the comics were always Captain America and Falcon as I remember them.
Unlike some people i grew to really like The Amazing Spider-Man, and I feel its much more watchable again and again then the first 3 spider-man movies (Also, Kirsten Dunst as MJ was a serious miscast).