What would make an interesting character?

Someone driven by inner pion, instinct to have fun, while doing everything to live it up, doing the things he's actually was created to do. Ability to be everyone and everything, being a sophistic master of language. Being a bad guy, the worst actually, and therefore very odious; at the same time being very alluring, because of giving ability to touch the untouchable, to feel what cannot be felt.The most amazing character ever - Mefistofel from 'Faust' by Goethe.