oh, constantly. but it's always changing, is the problem. actually, i've come to the opinion that that isn't really a problem. imagine an artist who's never satisfied with their work, either because it isn't good enough for them or because they're ready to move on to something completely different. that's not really a bad thing in and of itself. it's only in how they respond to that innate restlessness -- the engine that drives their work -- that could cause problems.