I went back to graduate school because I wanted to avoid being a professional, to try to piece together a life that would let me avoid the tenure race and full-time teaching.
I guess I've done a lot of different kinds of performing at various times - opera singing, poetry reading, not least high school teaching - and I do enjoy it, at least sometimes. But I find it incredibly anxiety-producing and exhausting. Privacy is more congenial, and I go a little crazy if I can't spend a big chunk of every day, or almost every day, alone. Certainly I have to be alone to write.
Teaching high school was my real training as a novelist: it got me out of my head, and (at least a little) out of books, and invested me in the lives of others and the world around me.