"Strictly speaking, you don't want to have failures, but a lot of people, they never fail. They get some sort of style down pat, and they just redo it their whole career. And they never fail, they always do something that's competent in their style to their limits. But they never fail! That's because they're not really artists. Sure, they might have been an artist on the first one, but every subsequent one is just cashing in."
--Larry Beckett
(From an interview here:
http://www.furious.com/perfect/larrybeckett.html)