Captain America 2 was a decent movie, but not one that sticks in the mind. It has good material: topical issues about pervasive surveillance and preemptive strikes, and Captain America’s retro-style idealism in a corrupt modern era, but didn’t push these themes so well.
The action was good, particularly when the Winter Soldier was involved, as someone who could keep up with the Captain. Johansson was much better than in the Avengers. I didn’t like the Nick Fury part of the plot, it was predictable.
Incidentally, the TV series Agents of Shield tied in to the movie’s release with some spoileriffic plot twists, but on the other hand it did get me to watch the movie.