A poet or prose narrator usually looks back on what he has achieved against a backdrop of the years that have passed, generally finding that some of these achievements are acceptable, while others are less so.
Best advice that I ever got is to do whatever it takes to make myself happy, so that I'll be able to make others happy. If I'm not happy, I can't make other people happy.
Heroes are never perfect, but they're brave, they're authentic, they're courageous, determined, discreet, and they've got grit.