The Joker is awesome, he is unnerving and iconic, unpredictable and ruthless. The unnerving and unpredictable part are what puts him above most comicbook villains in my book. The lack of sympathetic qualities, of redemption. His insanity makes him nearly impossible to relate to. He is the other. At no point do we ever see him in a light other than 'adversary.' This kind of villain is more entertaining to me especially when it has great writing and a complex nature.