hmm... searched for it.. didn't find it. Must have been on another board.
Here is the list from Inside the Actors Studio as given by Lipton:
What is your favorite word?
What is your least favorite word?
What turns you on?
What turns you off?
What sound do you love?
What sound do you hate?
What is your favorite curse word?
What profession other than yours would you like to attempt?
What profession would you not like to participate in?
If heaven exists, what would you like to hear god say when you arrive at the pearly gates?