I really do feel like I can related to Arkham's Joker, as I too am a sociopath. Sure, I haven't been classified as such by a psychological professional (I'm far too smart for that) but I recognize enough symptoms to know I'm mentally 'ill'. Personally, I feel that the Joker has yet to realize his full potential and he could learn a thing or two about from me. We would probably bond over our mutual hate for society and it's hypocrisy and how other people are only useful as pawns. We could take turns showing each other our knife collections, though I'm sure mine is much larger than his.