Full Interview here
Q: You wouldn't consider yourself crazy?
Allen: No, no. My problem is that I'm middle-class. If I was crazy I might be better. That probably accounts for my output. I lead a very sensible life: I get up in the morning, I work, I get the kids off to school, do the treadmill, play the clarinet, take a walk with my wife. It's usually the same walk every day. If I were crazy, it would help. If I shrieked on the set and demanded, it may be better, but I don't. I say, "Good enough!" It's a middle-class quality, which does make for productivity.