RPG Premise

[terrycloth]

A game where the players are demons -- creatures that feed off anger and hatred, who 'leak' those emotions into the world around them, who have powers fueled by them that destroy and corrupt.

But they can only feed of anger and hatred when an angry, hateful person drops into a 'lower energy state' of calm acceptance -- the extra anger energy is emitted like a photon they can catch. So, using their powers of hatred and destruction, they have to go around making people feel better.

Or alternatively, they could be angels, who feed off happiness and love...