* AwesomeEgo: Luthor is at his best when he's bragging about how great he is.
* CantUnhearIt: Chances are that Creator/ClancyBrown's voice is the one you'll hear in your head when reading his lines.
* DracoInLeatherPants: [[Series/{{Smallville}} Thank you,]] Creator/MichaelRosenbaum.
* FashionVictimVillain: ... A purple and green jumpsuit. [[PunctuatedForEmphasis Purple. And. Green.]] What was he ''thinking'' in the 1970's?
* FoeYay: His relationship with Superman is complicated. There was that time in the beginning of ''WesternAnimation/SupermanDoomsday'' he mentioned how much he admired him. Franchise/WonderWoman [[ComicBook/BlackestNight once made him admit]] that he wanted to ''be'' him. They also have a [[ComicBook/{{Superboy}} kid]].
** To say nothing of his sexual relationship with one of the {{Comicbook/Supergirl}}s in the 90's.
* MagnificentBastard: The premier MB at DC, always coming out on top of the competition.
* MemeticMutation: Once, when no one was looking, he stole '''forty''' cakes. [[note]]That's as many as four tens.[[/note]] [[AndThatsTerrible And it was terrible.]]
** "[[VideoGame/{{Superman 64}} If you want to save your friends, solve my maze]]!"
** ''[[VideoGame/{{Superman 64}} Lex Wins]].'' '''*[[GameOver evil]] [[EvilLaugh laugh]]*'''
** '''[[Film/SupermanReturns WROOOOOOOONG!!!!]]'''
* RootingForTheEmpire: Can happen due to the nature of the conflict between an unpowered human and an alien god.
* StrawmanHasAPoint: Luthor's fear of aliens certainly isn't groundless, given the existence of the likes of Zod, Comicbook/{{Brainiac}}, and Mongul. The fact that of all these potentially and genuinely threatening aliens Luthor tends to focus all his hatred on the alien who is trying to help (and is upstaging Luthor in the process) is pretty telling, however.