An existential question

Once you get over crippling fear, anxiety and self-hatred, exactly what is it that motivates you? I wonder this sometimes considering that I seem to have solved most of the major problems in my life - I've gotten over a lot of the issues inherited from my childhood, I earn a frugal but adequate living doing something I'm good at and uses my skills, I seem to have found somewhere "I belong". But it's weird no longer having that Push Towards Greatness which made me miserable but still gave me direction in my life.

I still want to accomplish something that will make the world a significantly better place for having had me in it, but now have to decide what that might be. Research and writing? Pop music? Opera? Political activism? There are so many things I can do but I no longer have a clear vision of what I should do. One option might be to give up and to spend the rest of my life having fun, but that would see to be rather an anticlimax. I do need "stretch goals" to feel fulfilled.