The main difference I see is that evils are doing 'it' for themselves, while goodies do 'it' for something beyond them. And that's where perspective comes in, because both might be doing the same thing, while each perceives/justifies it differently. Onlookers might also perceive both differently.
Also, even the most evil person imaginable likely doesn't see himself as such, rather he does what he feels he must (even if he enjoys it a little too much ...).
Edited 1 time(s). Last edit at 07/04/2013 10:24AM by RiderOfStorms.