Robert Redford, as Alexander Pierce, just made me sad. He was supposed to be the bad guy, and I didn't believe him. I don't think he believed himself either.
Sebastian Stan as Bucky Barnes/The Winter Soldier was the best actor of the bunch. I believed his pain and confusion. Samuel L. Jackson was, well, Samuel L. Jackson. He is just the coolest fucker on this planet.
Chris Pine as the lead character, was as adequate as someone who looks like they are sculpted out of granite can be. He plays the hero well.
So go--have your exciting escape! A guy who flies on a shield will be there to scoop you up and carry you away!