Which kind of humour do you prefer, the written kind like The Simpsons (when it was still funny) or the improvised kind like that show Whose Line Is It Anyway. While it is true that penned humour can be funny, if it isn't written well, the joke will just fall flat on its face. The same sort of goes for improv. If you don't adapt to what's being thrown at you, then you'll find people laughing at you, not with you.