'The Simpsons' was about children and married parents; 'Futurama' is about people in between; they're growing up and haven't settled down. Every other cartoon show seemed to be, you know, dumb dad, bratty kids.

The conundrum that I face on a daily basis is that I have two sons who have grown up watching 'The Simpsons,' so they know exactly what buttons to push. They know how Bart irritates Homer, and they use these lines against me to tell me that I'm not funny anymore.

With "Futurama," I wanted to do unrequited love, and David Cohen agreed, and although our original plan was never to have Fry and Leela get together, we finally just said, "You can only string the fans along so far."

I want it to go on, but I want us to go out on top.

The thing about a cartoon is, you can do whatever you want. The tightrope that we are walking on 'The Simpsons' and 'Futurama' is "How do you continue to surprise the audience, but make them good surprises?" Not every surprise is good, but you want to continue jolting people.

Oftentimes, what seems to be a street lunatic charging at me spouting gibberish turns out to be a devoted 'Simpsons' fan quoting their favorite line.

Sometimes people try to read into my strip and find out what my state of mind is. And I can say if I'm in a good mood, generally the comic strip starts out in a good mood, but the punchline is very negative and sour.