!!Patrick Bateman
* AmbiguousDisorder: Seems to have Borderline Personality Disorder (in ''addition'' to his [[{{Narcissist}} narcissism]], [[{{Sadist}} sadism]], and [[TheSociopath sociopathy]]), as this would explain his hallucinations as well as some other things he reports, such as identity disturbance, his mood swings, and his tendency to not feel much of anything.
* AxCrazy
* BrokenAce: A Type 1 ''and'' a Type 2.
* Creator/ChristianBale
* {{Cloudcuckoolander}}: Hallucinates that an ATM tells him to feed it a stray cat. He actually tries to do it.
* CreepyMonotone
* DeadpanSnarker
* DevilInPlainSight
* EvilIsPetty: Almost all of his murders are motivated by people having nicer clothes or better apartments than he does.
* FauxAffablyEvil
* {{Hallucinations}}: Caused by stress, and extremely bizarre, but he believes every one of them.
* InferioritySuperiorityComplex: Despite his insane levels of narcissism, it is shown often that Bateman utterly detests himself as much as he does everyone else and most of his murders are motivated by people unintentionally reminding him of this.
* ItsAllAboutMe: The only people he refuses to kill are ones who profess some affection for him, all of which he coldly discards.
* KarmaHoudini: And boy is he upset about this status.
* KillThePoor
* MorallyBankruptBanker
* MoralityPet: Luis and Jean. Not only are both in love with Bateman, they're also the only two characters in the story who are genuine people and completely honest. Consequently, Bateman can't bring himself to kill either of them.
* {{Narcissist}}: Ye gods...
* PetTheDog: In the book, he drops a coin into a homeless girl's cup to see if he's capable of doing something good. It's subverted since the girl was a student and the cup was full of coffee.
* PoliticallyIncorrectVillain: He hits the trifecta: he's sexist, racist, ''and'' homophobic.
** And yet, he frequently pokes jibes as his "friends" for [[{{Hypocrite}} making even mildly prejudiced remarks.]]
* PopCulturedBadass: Some chapters consist entirely of him going on tirades about music, be it Whitney Houston, Huey Lewis, or Elvis Costello.
* {{Sadist}}
* SerialKiller
* TheSociopath: Informs everything about his life -- the film's director describes him as a Martian trying to imitate human behavior (and never quite hitting the mark). He is probably one of the best examples in media.
* StepfordSmiler
* TallDarkAndHandsome: As we learn during his narration of his morning routine, he is the pinnacle of physical perfection.
* ThroughTheEyesOfMadness
* UnreliableNarrator: His sanity is, at best, questionable.
* VillainProtagonist: With a capital "V".