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!!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.
* ArsonMurderAndJaywalking: In addition to torturing prostitutes and stabbing a child to death, he also enjoys [[HarassingPhoneCall making obscene phone calls and]] [[PokeThePoodle buying a box of cereal with an expired coupon.]]
* AttentionWhore: [[spoiler: Confesses his crimes near the end because he wants people to ''know'' him and because he wants to ''matter''! It doesn't work as no one believes him and his crimes may have been all just a fantasy. In the end, no one will give a shit about him, no matter how hard he tries.]]
* AxCrazy: See AmbiguousDisorder for a list of his disorders. He also is a SerialKiller to boot, and at one point [[AnAxeToGrind literally kills someone with an axe]].
* {{Cloudcuckoolander}}: Hallucinates that an ATM tells him to feed it a stray cat. He actually tries to do it in the movie.
* CreepyMonotone: His InnerMonologue is this, talking about murder and torture as if it was a mundane hobby he has.
* DeadpanSnarker: Makes several snarky comments at the people around him, when he isn't thinking about killing them, that is.
* EvilIsPetty: Almost all of his murders are motivated by people having nicer clothes or better apartments than he does.
* FateWorseThanDeath: Trapped in a shallow world of greed and hatred than he despises as much as he detests himself. [[spoiler: All while knowing that nothing he does will ''ever'' be of any consequence.]]
* FauxAffablyEvil: While he does enjoy making articulate lectures about pop music and chatting about Men's fashion, most of his polite and politically correct behaviour is a MaskOfSanity that barely stays on half the time. A good example is [[BaitTheDog when he appears to sympathize with a homeless man and gives him some money before stabbing him to death]] [[ShootTheDog and killing his dog.]]
* {{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: He escapes punishment for all his crimes, and boy is he upset about this status. See FateWorseThanDeath.
* LaughablyEvil
* MaskOfSanity: And it's about... to slip.
* MorallyBankruptBanker: A banker and AxCrazy SerialKiller.
* {{Narcissist}}: Ye gods... Half of his InnerMonologue is centered around how superior he is and how perfect he does everything.
* PoliticallyIncorrectVillain: He hits the trifecta: he's sexist, racist, ''and'' homophobic, as well as [[KillThePoor extremely elitist]]. And yet, he frequently calls out his "friends" for [[{{Hypocrite}} making even mildly prejudiced remarks.]]
* PopCulturedBadass: Deconstructed. Patrick Bateman tries to define himself through his appreciation for music, art, and pop culture and relates this much to the reader/audience, but his grasp and understanding of his favorite music and artists is reduced to what material they make the most appealing to the widest audiences and lowest common denominator, such as rejecting early Music/{{Genesis}} albums with Music/PeterGabriel (and his "lame solo career") as being "too artsy, too intellectual" and favoring the more commercially-driven direction of the group after Music/PhilCollins became the group's frontman. Other assessments he makes of popular singers and bands are frequently off-the-mark and factually wrong, like being convinced that Music/WhitneyHouston is a ''jazz'' singer or believing [[Music/TheRollingStones "You Can't Always Get What You Want"]] is a song by Music/TheBeatles. Elsewhere, he often speaks of owning what's described as the original version of [[https://s-media-cache-ak0.pinimg.com/600x315/5e/2e/c5/5e2ec5ee9ec77bb094ef1b45e762d45a.jpg "Sunrise with Broken Plates"]] by artist David Onica (while discreetly boasting of the high cost he paid to obtain it), only for his ex-girlfriend to point out to him that he hung it upside down. All of this only serves to further demonstrate Patrick's shallowness and delusions about having "good taste."
* PurelyAestheticGlasses: He seems to just wear them because they are designer and because all his other Yuppie friends wear the same thing.
* {{Sadist}}: Gets off on causing pain. [[spoiler:But Patrick knows even if he's doing something like that, it will never bring ''any'' consequences. '''''[[FateWorseThanDeath EVER.]]''''']]
* 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.
* TallDarkAndHandsome: As we learn during his narration of his morning routine, he is the pinnacle of physical perfection.
* ThroughTheEyesOfMadness: He once sees that a cheerio is the guest on a talk show and an atm tells him to feed it a cat.
* UnreliableNarrator: His sanity is, at best, questionable.
* VillainProtagonist: A SerialKiller with a host of disorders making him AxCrazy. Our central focus, everyone. And even if he's just imagining the murders, he's still an unlikable, self-centered, elitist, racist, shallow bastard.
* WouldHurtAChild: He stabs a small boy to death just to see if he'd enjoy it. He doesn't... because he doesn't find it ''evil enough.''