Everything I did is because I wanted to do it. If I weren't playing this arena, if I were playing a club, I'd still be doing it because that's what I want to do. I love playing the guitar.
Using the device of an imaginary world allows me in some strange way to go to the central issues - it's one of many ways to express feelings about real people, about real human relationships.
The Simpsons can go anywhere in the world and not worry about any budgetary issues. However, even when the show has had its run, I think the characters can go on in perpetuity.