I'd be Mrs. Peanut for the obvious reason that I would be married to Mr. Peanut. The above answer still counts despite the fact that Mr. Peanut is not a person and Mrs. peanut does not even exist, right? I sure do hope so...
Ayrton Senna, Juan Fangio, Steve McQueen, Salvador Dali, Edmund Hillary, Richard Branson- the founder of the Virgin Records/Airlines etc empire who does crazy stuff like flying a balloon around the world and attempting speed records crossing the Atlantic... because he has so much money he can do crazy stuff like that. I would like to be anyone who lived(s) for adventure and did crazy stuff most people could or would never attempt