Once you get to that point when you can just be yourself and relax, I just think that you're so much happier in general.
The Golden Rule of Parenting is; do unto your children as you wish your parents had done unto you!
As a busker, one thing that does not work is self-consciousness. A busker needs to be working. A busker needs to shed all ego and get down to work. Play your songs, play them well, earn your money, and don't get in people's way.