I wouldn't choose any on this ist, myself. for those who watched heroes, peter petrelli's original power mimicry incarnation (before he lost his power for a while), or the ability to control objects at a molecular level :P
of those on this list, telepathy or invincibility. the former is one of the most formidable tool one could acquire, literally allowing you to know what anyone will do before they do it, knowing their reactions, what they know, and how they would react to any given stimulus behind the mask that we all wear at all times (figurative one), and the latter is just plain fun.