* AwesomeEgo: Luthor is at his most entertaining 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? Well, it ''was'' the Seventies.
** Yeah! Only a [[SelfDemonstrating/{{TheJoker}} crazy person]] would dress like that!
* 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 once had [[ComicBook/{{Superboy}} a son]].
** To say nothing of his sexual relationship with one of the {{Comicbook/Supergirl}}s in the 90's.
* HilariousInHindsight: In the original ''[[Film/SupermanTheMovie Superman]]'' films, Luthor was played by Creator/GeneHackman, who would later play the crooked U.S. President in ''Film/AbsolutePower'' and guess what Lex Luthor [[PresidentEvil would later be running for]].
** A famous owner of a MegaCorp shocks the world by announcing his candidacy for President, using his status as an outsider of politics and a platform heavy in curbing aliens' status in the country to gain more points with voters than initially suspected. Lex Luthor or Donald Trump?
* 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. AndThatsTerrible.[[/note]]
** "[[VideoGame/{{Superman 64}} If you want to save your friends, solve my maze]]!"
*** ''[[GameOver Lex Wins]].'' '''*EvilLaugh*'''
** '''[[Film/SupermanReturns WROOOOOOOONG!]]'''
** He also won't wash his hands. 'Cuz he's eeeeevil.
** Generally speaking, being white, bald, and evil will inevitably draw comparisons to Lex.
* MoralEventHorizon: While Luthor is AffablyEvil and most of his actions do not go beyond his obsession with Superman (standard villainy), he is a big candidate of this. Some of his most depraved acts are listed:
** His collusion with Brainiac and negotiating the planet Earth for him is the most infamous MoralEventHorizon.
** The murder to his own father as well.
** Under Creator/JohnByrne, Luthor engages in quite a lot of ForTheEvulz manipulations of women, most infamously his "game" of finding married working-class women, offering them millions in exchange for one month in Metropolis as his consort, and then deliberately leaving ''before'' they can decide so that they'll be tormented for the rest of their lives. And as the head of Lexcorp, he's shown intimidating attractive women in his employ to sleep with him.
** During Comicbook/TheDeathOfSuperman storyline, he murders one of his martial arts trainers for knocking him down during a sparring session, reveling in the idea that Superman's absence means he can get away with anything he wants. Oh, and just for added kicks, he makes sure an ex-con janitor at Lexcorp will be framed for it.
* RootingForTheEmpire: Can happen due to the nature of the conflict between an unpowered human and a demigod.
* TheyChangedItNowItSucks: Not everyone is happy about Luthor's transformation from a high-tech inventor criminal mastermind to a CorruptCorporateExecutive. Creator/NeilGaiman (who wrote this version of Luthor in his ''Black Orchid'' miniseries) laments that Luthor has become a "skinny [[ComicBook/TheKingpin Kingpin]]"[[note]]"I liked him better as a bald scientist. He was in prison, but they couldn't put his mind in prison."[[/note]]. Fans of the Franchise/{{DCAU}} version noted that Luthor became more dangerous, intimidating [[EvilIsCool and cool]], when he shifted from TheEighties Luthor businessman getup to his Silver Age MadScientist shtick.