User blog comment:Miskos3/Fairy Tail Chapter 367: Jellal vs. Oracion Seis, Review/@comment-82.20.156.238-20140118052530/@comment-4829046-20140118151923

To me, insane psychopathic villains are the best as they disappoint the least in terms of consistency, the main reason being, because as a rule they aren't consistent and are very unpredictable XD Very good examples being The Joker(like you mentioned), Vaas(Far Cry 3), Raul Menendez(CoD Black Ops II), and others from anime being pretty much majority of the cast in Soul Eater and also some of the villains in SAO. This also applies to a certain degree to some Mad scientists across media but very few can come to the level of the ones I mentioned above. But I do need to mention one such mad scientist type that isn't really a villain but still deserves the title. Hange Zoë from SnK.