!YMMV tropes present in the book:
* CrowningMomentOfAwesome: Several, though one of the many mentions goes to the ending, where Fred, George, Harry, Ron, and Hermione all jinx Malfoy, Crabbe, and Goyle with every spell they know.
* CrowningMomentOfHeartwarming: Hermione kissing Harry and Ron on the forehead after they came back from underwater in one piece.
* FandomNod: The pronunciation of "Hermione", which was finally clarified by Hermione herself in this book -- then [[Film/HarryPotter the films]] were released, so everyone knew how to pronounce it anyway.
* FunnyAneurysmMoment: Ron notes at the end of "House Elf Liberation Front" that 'Percy wouldn't recognise a joke if it danced naked in front of him, wearing Dobby's tea cosy'. Cut to [[Literature/HarryPotterAndTheDeathlyHallows Deathly Hallows]] where Percy shows he ''does'' recognise and can tell a joke right before [[spoiler: Fred is killed]].
** At one point in the book, Fred and George tell their angry mother that if she yells at them now and the Hogwarts Express crashes tomorrow, [[PartingWordsRegret that'll be the last thing she ever said to them]]. In context, it's pure BlackComedy (even to Molly), but a [[Literature/HarryPotterAndTheOrderOfThePhoenix year later]] we find out that Molly's biggest fear is losing her family. Worse in ''Deathly Hallows'' [[spoiler:see above spoiler]].
** Dumbledore's remarks about Aberforth to Hagrid, notably his comment that he's "not entirely sure he can read", are amusing at the time. When, in DH, we learn about the estrangement of the two brothers, and the extent to which Albus' intelligence helped to contribute to that situation, it appears a considerably more mean-spirited thing to say.
** Reread this particular book after reading the last one or watching the last movie. Seen it yet? Well, note Fred and George's failing potion to age them. [[spoiler: This is the ''only'' time the two will grow old together...]]
* HarsherInHindsight: When Sirius meets up with the Trio, Hermione keeps going on about how badly Winky was treated by Crouch. When Ron tells her to give it a rest, Sirius remarks that the best way to tell a man's character is to see how he treats his inferiors, not his equals. [[{{Hypocrite}} Less than a year later he'll be treating his own house-elf, Kreacher, like dirt on his shoe.]]
* HilariousInHindsight: After the First Task, when Madam Pomfrey, the school nurse, is attending to the Champions' wounds, she exclaims, "Dragons! ... Last year dementors, this year dragons, what are they going to bring into this school next?" Fans all know by now that the next year would see something far worse enter the grounds of Hogwarts School: [[SadistTeacher Professor Umbridge]] as [[TyrantTakesTheHelm The Tyrant Taking The Helm]].
** The whole fact that Harry's incredibly handsome rival Hogwarts champion is played in [[Film/HarryPotter the movie]] by [[Literature/{{Twilight}} future Edward Cullen]]. And really, the rivalry between Harry's supporters and Cedric's supporters could easily be compared to the FandomRivalry between ''Harry Potter'' and ''Twilight'' -- particularly the way in which Harry and Cedric (a.k.a. DanielRadcliffe and RobertPattinson) are nothing but civil to each other while each has fans who volatilely bash their hero's rival. It doesn't help that Cedric first makes an appearance by ''jumping out of a tree''. Maybe, he was bothered? His ghost is also sparkling.
** Also, Creator/DavidTennant said in an interview at the movie premiere that he'd probably never be part of such a large fandom again. [[PromotedFanboy One year]] [[Series/DoctorWho later]]... His character also uses a long, handheld tool, has a chest that's BiggerOnTheInside, changes faces/actors and his last line is [[{{Foreshadowing}} "I'll be welcomed back like a hero".]]
** "Can I have a look at Uranus too, Lavender?" You'll get your chance, Ron, when [[spoiler: you start dating her in Book 6.]]
** Ron asked [[spoiler: his future ''sister-in-law'' to the Yule Ball]].
** It's now almost impossible to watch the reaping... er, choosing of the teenaged contestants in a deadly tournament without thinking, "[[Literature/TheHungerGames May the odds be ever in your favor]]" as their names are called out.
** Overlapping with HarsherInHindsight: Filch putting on music as Professor McGonagall dances with Ron can remind many of [[GameOfThrones Walder Frey]] (portrayed by David Bradley) ordering to play "The Rains of Castamere" during the Red Wedding.
** The fans' uproar over Hermione wearing pink instead of blue to the Yule Ball. Fast forward to ''Literature/BalletShoes'' where a small fuss is made over Pauline (Emma's character) getting a blue gown for a premiere. So fans finally get to see Emma wearing blue at a formal occasion.
* IdiotPlot: The whole plot of the book hinges on the fact that [[spoiler: Bartemius Crouch Jr. was too dumb to just use a normal object as a portkey instead of the Triwizard Cup to transport Harry to Little Hangleton graveyard. And for having Harry use said portkey in the most publicized event in Hogwarts history, as opposed to the privacy of his own office.]]
** [[spoiler:The justification was that Voldemort was trying to make Harry's death look like an accident. In a highly dangerous tournament, that'd be easy to pass off. Even if Dumbledore guesses that it's a murder anyway, due to Harry being somehow put in the tournament against his will, they wouldn't be able to tell that Voldemort did it.]]
* LauncherOfAThousandShips: Continuing the series tradition, the introduction of new characters as well as already existing ones being made prominent created some new ships, including Harry/Cho, Cedric/Cho, Harry/Fleur, Ron/Fleur, Hermione/Krum, Hermione/Cedric, Krum/Fleur, Cedric/Fleur.
* MagnificentBastard: Voldemort and Barty Crouch Jr.
* NightmareFuel: Rowling was apparently surprised that the editors didn't object to Voldemort's resurrection scene, specifically [[spoiler: Voldemort's fetus-like rudimentary body.]]
** [[spoiler:Wormtail cutting off his own hand.]]
** The trial [[spoiler: of Barty Crouch Jr, with Junior begging and crying for mercy and Senior showing no emotion or connection towards his son until he finally loses it and screams at him that he has no son. YMMV, since at the end it's revealed that Crouch Jr. actually was evil and guilty, though his story still is tragic.]] Also, the torture of Frank and Alice Longbottom.
** For those with a fear of deep, dark water, the Second Task as a whole.
* NoSuchThingAsBadPublicity: This entry brought the MoralGuardians out in full force against the series, ensuring this trope occurred. While still a good book in its own right, it wouldn't have been nearly as successful without all the [[AddedAlliterativeAppeal parents, politicians, and preachers]] decrying it for converting children to witchraft and Satanism. Some held burnings of it. This required them to buy copies to burn them.
* OneSceneWonder: Despite his one-and-a-quarter chapters' worth of pagetime, [[SacrificialLamb Frank]] [[BadassNormal Bryce]] still makes quite an impression.
* ShipSinking: [[spoiler: Cedric and Cho]]. Despite this book launching their ship, it's torpedoed at the end when [[spoiler: Cedric is killed]].
* ShipToShipCombat: Also, continuing the series tradition, the supporters of the new and already established ships took all new offensives for their pairings.
* WhyDontYouJustShootHim: The story would've been much shorter, had Voldemort stabbed Harry with the knife, rather than challenging him to a duel, thereby allowing him to escape. Justified, though; Voldermort was too egotistical to simply kill his archenemy in such a mundane, Muggle-like way, and was also trying to prove that he actually was more than a match for Harry and that his "death" was just a fluke, which admittedly it was. Harry didn't even know any good combat spells and once again only survived because of luck.
* TheWoobie --> JerkassWoobie: Barty Crouch, Jr. When we first see him, he is pleading for mercy as his own father disowns him in public and orders him thrown into Azkaban. [[spoiler:Unfortunately, it then turns out his father may have been right, as Crouch Jr. turns out to be a fanatical Death Eater who tortured Neville's parents into insanity, not WronglyAccused as assumed.]]
** Cedric's father after [[spoiler:the death of his son.]]
*** Harry Potter, too, for the same reason.
!!YMMV tropes present in the film:
* DracoInLeatherPants: Barty Crouch, Jr. has his share of fangirls, as can probably be expected whenever one casts [[Creator/DavidTennant David Tennant]] as anything.
* HeReallyCanAct: Look at Daniel Radcliffe's crying in ''Prisoner of Azkaban'' after TheReveal that Sirius is his godfather, which is just {{Narm}}-y. But Harry's complete breakdown after [[spoiler:he arrives back at Hogwarts with Cedric's corpse along with the news that Voldemort has returned]]? One of the biggest TearJerker[=s=] in the film series.
* {{Narm}}:
** Harry's massive putdown to Malfoy? "Your father is vile and cruel! And you're just ''pathetic''." It's [[ITakeOffenseToThatLastOne that last part]] that somehow wounds Malfoy deeply enough to try and curse him.
** Also David Tennant's weird tongue flick thing as Barty Crouch Jr. It's meant to be creepy and yet comes across as [[{{Camp}} pantomime villain stuff]].
** Hermione breaking down in tears at the steps after Ron "spoils" her big night at the Yule Ball - or in fact, actually the ''whole'' Yule Ball argument, what little of it is there. While the original chapter always carried a hint of satire on teen angst, it comes off looking even more ridiculous in the film due to the rather lackluster execution of the scene. Creator/RupertGrint (Ron) delivers his lines - which in the book were written with ''considerably'' vicious jealousy - with about as much interest as someone ordering a hamburger. Meanwhile, Creator/EmmaWatson (Hermione) starts off equally understated to the point of being just plain flat, and then she goes for the LargeHam approach with her reaction, which seems disproportionate to Grint's lack of investment in the scene. That her ''having the last word'' in the film actually gets undermined and upstaged by Ron doesn't help.
** And before the rather lackluster argument between Ron and Hermione, there's Hermione's fairly underwhelming BeautifulAllAlong debut at the ball - she pokes her head out shyly from behind the corner, slowly emerges (her Yule Ball dress changed from the periwinkle blue of the book to an unflattering shade of pink, probably to stand out against the blue background), and then we see her descend from the top of an unnaturally tall windy staircase as if she were a Disney princess (and the scene does feel rather reminiscent of the end of 1959's ''Disney/SleepingBeauty'') and Harry smiles in surprise as she descends before Ron gets a look at her. It's supposed to be really breathtaking, but despite all the fancy lighting tricks and sickeningly sweet fairy tale music, like so many similar scenes in big splashy Hollywood films before and after it, the scene just falls horribly flat...due mostly to the fact that Creator/EmmaWatson is just too naturally cute for it to work - never mind that none of the filmmakers ever did a particularly effective job of trying to make her look plain or ordinary before this film. It really does feel like it's just the same girl from all the previous scenes (and previous films) in a dress with a slightly different hairstyle; even Daniel Radcliffe (Harry's actor) lampshaded it in an interview.
*** The fact that Hermione's altered dress makes her look like Princess Bubble-Yum just makes the scene (and her part in the Yule Ball) look and feel even more ridiculous.
** The "HARRYDIDYEPUTYERNAMEINTHEGOBLETOFFIYAH???!!!?" moment from the film, especially comparing it to the way Dumbledore calmly asks it in the book.
** The entrance of the Beauxbatons students; they run up the centre aisle of the Great Hall and then...basically seem to ''fart bluebirds'' whilst sighing happily.
* RetroactiveRecognition: Hey, it's [[Series/DoctorWho the Tenth Doctor]] as Barty Crouch Jr.!
* TheyChangedItNowItSucks: Showing how some fans can take this trope to the extreme, one of the biggest complaints about the movie? Hermione's dress for the Yule Ball. It's blue in the book but pink in the film. There were ''thousands'' of complaints, even with the film's IMDB page in an edit war over listing "[[RealWomenNeverWearDresses Hermione is a person who hates pink and would never wear a pink dress]]" as a PlotHole. [[note]]The costume designer said that blue was the original choice but that it simply didn't look good on Emma Watson. [[http://img2.wikia.nocookie.net/__cb20091205103219/harrypotter/images/7/71/Periwinkledress.PNG Here]] is an edit of Hermione in the blue dress for reference. It's worth noting that the rest of them didn't wear the colours they had in the book for the film either - Harry went from green to black, Parvati went from pink to orange and Padma went from turquoise to pink. As for Hermione "hating pink", she's mentioned as wearing a pink dressing gown in the first book.[[/note]]