If I had to gist each... One piece villians (at least those) (if i'm thinking right): "I'm just evil" (regardless of backstory, those chose to be dicks x3) Bleach (again, if i'm thinking right): "fuck those in power"(aside from Ulquiorra? he's his own thing x3) Naruto: "i suffered in the past, so i'll end the worlds' suffering by force" (aside from Orochimaru, he wants to break life's limits and hungry for power, trying to achieve them by any means necessary)