I always think it's important to choose your initial theme very carefully because you're going to be married to it for a long time. You might have to generate an hour's worth of music from a very short, little piece of theme.
I was part of the sort of avant guard tradition of John Cage and music concrete and pushing back the boundaries of avant garde classic pop rhythms. I think everyone brings something completely different to it.
I think that music has an endless life.