I guess I still feel that way and yet I'm slightly hesitant to insist on that idea, that it "better be fun for the writer." Or rather, that if it is, then the pleasure is a sign that it's good. Maybe I feel I've read that somewhere, other writers saying it, and I just think there is possibly no formula, and I don't like to read an interview with a writer where they just lay out the doxa of what quality is. It can seem brittle to do that.