Robert Pattinson

Having a persona people recognize, it's the thing that probably gets you paid the most - but it's also the thing that virtually every actor in the world doesn't want. 'Cause, like, no one would believe me if I wanted to play something ultra-realistic, like a gangster or something.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.