This is part of what makes Steve Rogers special - his willingness to stand up, to get back up when knocked down and to act on his moral compass and conscience when it's the hardest thing to do and when others say it's wrong or it's breaking the rules. We see this in TFA and we see it in TWS and my from what we know we'll see it in Civil War. This is what makes Steve Rogers a compelling interesting unique character.
He doesn't need a kick in the pants emotional trauma to get his act together, he doesn't need to save people because of guilt or a need for redemption, he doesn't do it just because it's personal. He does it because he thinks it's the right thing to do and it needs to be done and he'll do it even if it costs him everything he has. It's a difficult road and at times it requires a lot of self abnegation and sacrifice - which is why being "a good man" is not boring or easy it's bloody difficult and inspiring.
In Civil War though we might see what happens when Steve possibly makes the wrong choice, maybe partially from selfish motives, thinking it's the right choice and how he comes to terms with maybe being wrong. That's a very compelling arc and that should be what the film is about, and hopefully what it is about.