We are what we learn to be when we're young, once the foundation is set, we have to reinvent and rebuild ourselves as adults to shore up the cracks and push-back against the bad habits.
Great post from Connie on this topic about separating your ESSENTIAL self from the productivity self. It's easy to judge "how much you got done." but getting through your to-do list doesn't make you a better human being.
You don't always have to be great at everything. One of the pitfalls of being a self-aware person who is into self-improvement is the tendency to focus on the negatives - after all, we program ourselves to look for little ways to improve.