Death Note

Death Note's main character was a villain named Light Yagami. This is what attracted me to the show. Mostly, all anime shows are the perspective of a good guy but death note changed that...sort of. Light started as a good guy like all but in his intention of using the death note to make a better world, light slowly changes sides. He's driven by this desire so much that he'll eliminate the innocent who get in his way. In his on mind he's the good guy but not al think so.
L is a very interesting character. He and light played of what was sort of a game. he was trying to expose Light as kira. Meanwhile, light was trying to convince his that he wasnt.
Misa is another character who holds a death note. However, her intentions with the note is to help light.

Its such a shame that the anime ended the way it did.