I know this is probably a really generic answer, but I'd choose to be almost any character from the Dr. Seuss books. Why? There's actually a whole bunch of reasons why. Dr. Seuss characters are smarter than we think - in fact, Dr. Seuss is a mastermind genius in himself. -nods- I've always enjoyed his work, from The little Who's in The Grinch who stole Christmas, to Green Eggs and Ham, to other various works he has produced.

Then again it could just be the kid in me.