!!YMMV tropes present in the book:
* AccidentalAesop: Hermione's subplot could be interpreted as, "Doing well in school is great, but your mental health comes first. No matter how smart you are, you can still bite off more than you can chew, so if school is putting a strain on your well-being, it's ok to dial back a bit."
* AlternativeCharacterInterpretation:
** Sir Cadogan, the portrait that takes over guarding Gryffindor Tower for The Fat Lady after she's attacked by Sirius Black, and whose work style involves setting "ridiculously complicated" passwords, and changing them at least twice a day. Is he stark raving mad, or ProperlyParanoid taken UpToEleven?
** Snape's behaviour in this novel, where he's at his most emotional and unhinged has drawn a lot of views. Notably fans invoke information from later series to explain why he was so personally angry at Lupin. Others however note that his taunting at Harry by using [[spoiler:Lily's own insults about James to the latter, and then having the latter remind him, much as Lily did in ''The Prince's Tale'' that James did save his life, and repeating the same conversation, while in the finale shouting at Harry that James deserved to die because he was too arrogant to trust Sirius is more or less him vicariously trying to argue that Lily was a fool for choosing James]] and wondering WhatDoesSheSeeInHim.
* CrazyAwesome: The Knight Bus, a bus that travels at amazingly high speeds, [[RefugeInAudacity regardless of Muggle traffic laws]], with contraptions such as making the bus skinny to squeeze between other vehicles.
* EndingFatigue: Not ''too'' bad, but off to [[spoiler:see Buckbeak get executed - diverted to shrieking shack, long PlotDump, Werewolf ensues, time turner, going ''back though the evening'']] and THEN it's over.
* FunnyAneurysmMoment:
** At one point in ''Literature/HarryPotterAndThePhilosophersStone'', Scabbers bit Goyle on the knuckle (which was even referenced by Fred and George Weasley in Azkaban). Come ''Azkaban'', and the revelation that Scabbers was actually Peter Pettigrew, who was the true person responsible for leaking Lily and James Potter's location to Lord Voldemort and thus their deaths, not to mention the revelation in ''Goblet of Fire'' that Goyle's father was most likely one of Pettigrew's comrades among the Death Eaters it becomes somewhat disturbing.
** Ron carrying him around in his pocket and Scabbers even falling asleep on Harry's bed at one point in ''Philosopher's Stone''. Counts in-universe too as when Pettigrew tries to plead with Ron for mercy, Ron (with appropriate anger and disgust) points out he let the rat sleep on his bed.
* GrowingTheBeard: Many fans believe that this is the turning point for the series as a whole, citing the encounter at the Shrieking Shack, the darker emotions and actual feelings of loss Harry feels about his family (that had not been really explored in the previous books) and of course the BittersweetEnding. [[spoiler:Sirius is proven innocent to Harry and Dumbledore but remains on the run alongside Buckbeak, and Lupin has to quit, while Harry worries about Trelawney's prophecy and the consequences of sparing Wormtail potentially bringing Voldemort back. Compared to the out-and-out positive victories in the first two books, it was bleaker and prepared for the gradual darkening of the remaining books]].
* HilariousInHindsight:
** "Awful things happen to wizards who meddle with time, Harry." And in the very next movie, [[Series/DoctorWho a certain time-travelling alien]] gets a FateWorseThanDeath.
** The part where Snape gets insulted by the Marauder's Map after Pottermore revealed that it was designed to do that to Snape and ''only'' Snape, not just anyone who tried to read it without the password.
** In the novel, Hagrid expresses worry that Buckbeak might have encountered [[spoiler:werewolf!Lupin]] in his escape from Hogwarts. As the [[Film/HarryPotterAndThePrisonerOfAzkaban movie]] illustrates, Hagrid need not have worried for Beaky's welfare in [[CurbStompBattle such a fight]].
** While discussing Sirius Black Hagrid says that if he had found Sirius before Pettigrew did he would have 'ripped him limb from limb'. Fudge dismisses the idea saying only a squad of top Ministry wizards would have stood a chance against him. Two books later we see a fight between Hagrid and a squad of Aurors. [[spoiler: Hagrid wins. [[CurbStompBattle Easily]]]].
* HoYay: Sirius and Lupin. Even more so in [[Film/HarryPotter the movie]].
** The following line was cut from American editions of the book. Make of that what you will.
--> The professor walked to Black's side, [[HoldingHands seized his hand]], pulled him to his feet [[DramaticDrop so that Crookshanks fell to the floor]], and [[ManHug embraced Black like a brother.]]
* IdiotPlot: The denouement at the end depends on the following characters (Snape, Remus) suddenly forgetting the following details: [[spoiler:Remus is a werewolf, tonight is a full moon, and Remus has to take the Wolfsbane potion. Remus forgets about it entirely, despite the fact that he tok it for the last year [[note]]he specifically says that he isn't too good a potion maker and the Wolfsbane Potion is very complicated, also he was very poor so he probably didn't have the ingredients[[/note]], which can only be explained in a character sense about how seeing Sirius and Peter Pettigrew on the Marauder's Map makes him think differently. Snape however comes ''to Remus room with the Potion'' (which he mentions during their confrontation) and despite having had a traumatic experience in his youth at the Shrieking Shack, still goes down there to meet Remus without having any real backup plan against a werewolf set to transform. Without this contrivance, Peter Pettigrew would not really be able to escape and Sirius still be on the run. Much also depends on the fact that Lupin tied up Pettigrew instead of hitting him with a Petrificus Totalus and moving him along by magic like Sirius did Snape. Of course a conscious Pettigrew would jump on the diversion made by Lupin transforming first chance he gets, grabbing his wand and escaping.]]
* ItWasHisSled: Sirius ain't evil. Lupin is a werewolf. Ron's pet rat Scabbers is really Peter Pettigrew, a human.
* MemeticMutation:
** Hermione's white face.[[note]]The only line in the entire series indicating Hermione's skin color, though several other times she is described as pale, and she is depicted as white on some front covers. Used as a justification for fans that were surprised at the casting of a black actress in Theatre/HarryPotterAndTheCursedChild, notably when J.K. Rowling claimed she'd never mentioned Hermione's race, even though theater casting has been color-blind like this for a while now; for example, there are adaptations that make RomeoAndJuliet black too, even though they are supposed to be medieval Italians.[[/note]]
** Snape's over-the-top final rant to Fudge after Sirius escapes, "This has something to do with Potter!" is often invoked as one of his catchphrases.
* NeverLiveItDown: Among a lot of fans, Snape never quite recovers from this book, even after re-reading the series with all his motivations revealed. He's wildly unprofessional, sadistically and openly cruel even to students like Neville to a level that would have gotten any teacher fired from a real-life school, [[spoiler:was willing to send Sirius to the Dementor's Kiss even after he was open to turning himself in to Dumbledore, and then outed Remus Lupin as a werewolf publicly. Even the revelation from the later books about Sirius bullying Snape as a young man and Snape being loyal all along doesn't vindicate his conduct, since his incompetence, i.e. neglecting to bring or mention the Wolfsbane Potion to Remus after entering the Shack, played a major part in letting Peter escape, a detail that slipped him since he wanted to get back at Sirius and Lupin]]. His behaviour is so bad that the movies had to tone him down to not make him too unsympathetic.
* OlderThanTheyThink: Many people assume that Rowling invented Hippogriffs for this book. [[http://en.wikipedia.org/wiki/Hippogriff She didn't]].
* OneSceneWonder: Aunt Marge only appears in one chapter (which has her name on it), but still manages to be among the more despicable characters in the series, perhaps even more so than her brother Vernon.
* ShippingGoggles: The series has enough of this to fill a page, but this entry probably has the best example, what has been dubbed "The Symbolic Flight". This theory states that because Harry and Hermione flew together on Buckbeak together and without Ron, that they are destined to be together - ignoring the fact that Ron was only not present because he broke his leg earlier.

!!YMMV tropes present in the film:
* AccidentalInnuendo: The scene from the book listed above is even more dodgy in the film, when Harry's Uncle Vernon keeps bursting into the room to find out what's going on. Vernon is played by Richard Griffiths, AKA [[Film/WithnailAndI Uncle Monty]].
* BaseBreakingCharacter: The Shrunken Head on the Knight Bus. Some find him bizarrely out of place and unnecessary, others find him a nice bit of comic relief. It's worth noting that it was approved by JK Rowling - who prevented Alfonso Cuaron from inserting a choir of tiny people playing the piano.
* BetterThanCanon: The AdaptationExpansion for the Time Turner sequence is widely agreed to be a big improvement over how it was handled in the books. A few readers missed the {{Foreshadowing}}, and thus found the twist to come really out of nowhere. The film expands on this - having Hermione suddenly turning up out of nowhere in classes at points throughout the film. Also the twist [[spoiler: that Harry himself conjures the big Patronus]] is Foreshadowed by having more events influenced by the time travellers - throwing the pumpkin seeds to warn that Fudge is on the way for example.
* BigLippedAlligatorMoment:
** After everyone arrives at Hogwarts to start the new year, the Fat Lady won't let them into Gryffindor Tower because she's too busy trying to shatter a glass with her voice.
** A lot of screentime is devoted to a blue bird flying through Hogwarts and twittering around; far longer than normal for a scene transition. The deleted scenes show that the sequence ran even longer - with the bird buzzing around Hagrid's head before getting shooed away.
** The choir singing an arrangement of the witches' chant from Theatre/{{Macbeth}}... along with croaking toads?
** It should be noted that the first two here do serve some purpose in introducing the Fat Lady and the Whomping Willow tree (or just refreshing viewers' memories for those familiar with the series) so that they don't come out of nowhere when they become relevant to the plot. But the frog choir? Yeah that's just straight up Hogwarts BLAM.
* BrokenBase: Half the fanbase considers this one of the best (if not the best) Harry Potter film in the franchise, or at least when the Harry Potter films started getting good. The other half considers this movie to be one of the worst (if not the worst) Harry Potter film in the franchise. The film was mostly better received by critics than the first two, although it was the first HP film not to get four stars from Roger Ebert. Also, this is J.K. Rowling's favorite film. It generally comes down to either "good scripting" vs. "good cinematography" (with the film lacking in the former and bountiful in the latter), or "DarkerAndEdgier" vs. "whimsical and fun" (with the film relishing in the former, as opposed to the latter which had endeared audiences to the first two films).
* ContinuityLockOut: This was the point when the movies started to get hard to understand for anyone who wasn't already familiar with the respective books. Most notably, this movie never makes it clear who Padfoot, Wormtail, Moony, and Prongs are, despite later movies operating on the assumption that the viewers all know.
* CriticalDissonance: The film was adored by critics when it came out, opening to the most critical success any ''Potter'' film had seen at that point. On the other side, it left the ''Potter'' fanbase fairly polarized.
* GrowingTheBeard: According to most professional critics, along with about [[BrokenBase half]] of the fans. At the very least, people agreed that the younger actors and actresses were finally fitting snugly into their roles (aside from the {{Narm}} mentioned below). What's more is that this was the first film to make deviations from the book in the name of PragmaticAdaptation, paving the way for the future films to do so (without falling into InNameOnly).
* HarsherInHindsight: Sirius's infamous line "I DID MY WAITING..TWELVE YEARS OF IT...IN AZKABAN" became this in 2018 with the release of the AllegedlyFreeGame ''Harry Potter: Hogwarts Mystery'', which features an energy meter that, if empty, forces players to wait unless they buy {{Microtransactions}}.
* InternetBackdraft: Best movie in the series? Worst movie in the series? Middlingest movie in the series? Whatever your opinion, a huge chunk of the fandom will loathe you for it.
* MemeticMutation:
** SIRIUS ''DID'' HIS WAITING! ''TWELVE YEARS'' OF IT! ''IN AZKABAN!!!''
** HE WAS THEIR FRIEND!
** Turn to page three-hundred and ninety-four.
* {{Narm}}: Has [[Narm/HarryPotter its own page]].
* NarmCharm: The examples in the above page, as well as "You foul, loathsome, evil little ''cockroach!''" They're a near 50/50 mix of [[CrowningMomentOfAwesome awesome]] and [[{{Narm}} narm.]]
* NeverLiveItDown: A lot of the fandom's complaints with Hermione stem from this film. Namely her getting Ron's line standing up to Sirius, Sirius telling her she's the smartest witch of her age instead of telling Harry he's truly his father's son, and her action scene on the Whomping Willow (despite the fact that she gets into a worse scrape than Harry in that one). If the fans ever complained about Steve Cloves turning Hermione into the CreatorsPet, expect this film to be mentioned as the root of it.
* SpecialEffectsFailure: At the very end of the scene where Lupin berates Harry for not turning in the Marauder's Map, there's an obvious (especially so when looking at the lighting) jump to a different take in the middle of a shot. It occurs just after Harry tells Lupin that he thinks the map might not be working since he saw [[spoiler:Peter Pettigrew]] on it.
* SugarWiki/NoProblemWithLicensedGames: The Game Boy Advance version, mostly.
* TheyChangedItNowItSucks:
** Many of the film's drastic changes from the book were not welcome to some:
*** The excision of the explanation of the identities of Moony, Wormtail, Padfoot, and Prongs, which confused many moviegoers who hadn't read the books. Especially since it would have been relatively simple to slip into [[spoiler: Lupin's final scene]].
*** The talking ShrunkenHead on the Knight Bus.
*** Ron losing his AwesomeMoment of standing up for Harry in front of a supposedly-murderous Sirius, [[TheDeterminator with a broken leg]], to Hermione, who, unlike Ron, had already had no shortage of moments to shine in the films.
*** The Dementors are growling, hissing, flying ghouls who, while effective for what they are, are just classic horror-monsters as opposed to [[EldritchAbomination disturbing, otherworldly beings]] who didn't ''need'' to pose any physical threat, or even move at any speed, because the ''mental'' effects of their sheer ''presence'' was enough to incapacitate their enemies. The changes to their design and behavior also make them more animalistic, even though they are sentient humanoids in the books  albeit ones much weirder and more threatening than Goblins or Elves.
** Then changes compared to the ''previous'' two films in the series:
*** Alfonso's complete redesigning of Hogwarts geography, as well as the general shift in tone, with more openly-comedic moments but also a general DarkerAndEdgier feel that contrasts from the more whimsical tone of the first two films. (This was meant to translate the introduction of darker themes in the books as the series went on, but in the books it was a progressive, creeping growth that you didn't necessarily notice as you went, whereas the transition in the films was more abrupt.) Regardless of the actual tone, the fact that the visuals were ''literally'' darker and less colorful was controversial for people who preferred the previous films' brighter and warmer color-design.
*** Though a recast was unavoidable due to AuthorExistenceFailure, the radically different [[Creator/MichaelGambon new Dumbledore]] didn't sit too well with quite a few people; for one thing, little effort was made to make him look or act like the Richard Harris portrayal of the first films, even for really basic things like his haircut or trademark gold-rimmed glasses. Indeed, regardless of his ''acting'', Gambon's Dumbledore physically looks less like his book self than Harris's.

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