!!The book series provides examples of:

* AngstWhatAngst: The preteen to teenage main characters aren't nearly as psychologically affected by always having to fight monsters that are trying to kill them so often as they probably would be in real life. At the very least, there's no sign of PTSD. However, given that they have to do this for years on end, it could be safe to assume they just get desensitized by it, or as demigods are more geared to handle such things.
* AntiClimaxBoss: Every big threat in ''The Last Olympian''. [[spoiler:The Drakon dies in six pages, and Kronos barely fights enough to look strong. Even in the last fight it didn't take too long to bring him down. Even Typhon.]]
** Especially [[spoiler:Typhon.]] At least the others had actual battle scenes where the hero had to struggle. [[spoiler:It might be justified, however, since he's described battling the whole pantheon during the final battle, but even so we see very little of that.]]
* BigLippedAlligatorMoment: The incident with the Sphinx in the Labyrinth was either this, or an AuthorFilibuster. [[EpilepticTrees Of course, it's entirely possible that it was included because Riordan got frustrated and needed to vent some steam with his opinion on standardized testing.]]
* CrackPairing: Tons. Rachel/Nico, Thalia/Nico, Percy/Clarisse, Rachel/Luke, Apollo/Hermes[[note]]Which is actually technically possible in the [[Myth/ClassicalMythology source material]], especially given the fact that both are involved in same-sex relationships with mortals and other gods[[/note]], etc.
* CrazyAwesome: The [[OurCentaursAreDifferent Party Ponies]].
** Apollo.
* DieForOurShip: Rachel is frequently treated to this by Percy/Annabeth fans. It considerably lessened after the last book, however.
* DracoInLeatherPants: [[spoiler: Luke Castellan.]]
* EnsembleDarkhorse: Nico di Angelo gets the most love in this category, going from cute, annoying kid to an emo badass over the course of the series.
** Fandom still showers attention on his sister, Bianca di Angelo, too. Never mind that she [[spoiler: dies in her introductory book. Many fanfics explore either her life after death or her life in a "What if?" scenario should she have lived.]]
** The twins, Artemis and Apollo, also get a lot of love, despite their very minor appearances. Quite a few fanfics are dedicated to them.
** Similar to the above, the Hunters of Artemis get a lot of attention in fanfic, especially notable considering that very few members are named. Artemis's lieutenant, Zoë Nightshade, is especially popular.
** [[ThirdOptionLoveInterest Calypso]] has quite the following, and avoids the DieForOurShip treatment that Rachel first suffered. Many rejoiced when [[spoiler: she returned in the sequel series.]]
* EvenBetterSequel: Most agree that the books get better with each installment. ''The Battle of The Labyrinth'' had even more of awesome moments and CharacterDevelopment in comparison to the already strong ''Titan's Curse''.
** ''The Last Olympian'', big time.
* FanPreferredCouple: While Percy/Annabeth is still dominant, there are still rather decently sized fandoms for Percy/Luke, Percy/Nico, Percy/Artemis, Apollo/Hermes, Poseidon/Athena and Percy/Thalia.
* FoeRomanceSubtext: Luke and pretty much everyone. Particularly Percy, Thalia, Annabeth, and (if you squint) Grover.
* FunnyAneurysmMoment: Percy and Nico's first meeting is a pretty funny scene where Percy saves Nico's life and Nico proceeds to talk his ear off about mythology. It's significantly harsher after [[spoiler:''Series/TheHeroesOfOlympus'' showed a glimpse of Nico's POV in that scene--basically, he saw Percy as a mythical hero come to life, which only made his crush and Percy's failure to save Bianca that much harder for him to accept.]]
* GeniusBonus:
** If you live in Washington, D.C., you may have figured out the plot twist about Bianca and Nico di Angelo in ''The Titan's Curse'' prior to the reveal that they spent time in the Lotus Hotel & Casino: To evade their pursuers in Washington, D.C., they duck into the UsefulNotes/WashingtonMetro. Bianca says the Metro is new to her, and she even mentions that the last time she and Nico came through D.C. (which was no less than a year prior to the events of the story), the Washington Metro did not exist. Just for the record: the story is set in 2007. The di Angelo siblings are in their early teens. It seems odd that Bianca would make such a remark when the first segments of the Washington Metro system opened in 1976, well before either Nico or Bianca would have been born. Once Percy deduces that they spent time in the Lotus Hotel & Casino, it makes sense that they must have entered it sometime ''before'' construction of the Washington Metro ever started. ''The Last Olympian'' reveals that they were actually born sometime in the mid-1930s, and put in the Lotus Hotel sometime around 1941.
** It might or might not be intentional, but the mention of a statue of Susan B. Anthony strangling Frederick Douglass in ''The Last Olympian'' might be a roundabout reference to how the two civil rights leaders, formerly steadfast allies, became divided over the issue of the Fourteenth Amendment allowing black males to vote, but not women of any race (and to add insult to injury, it was the first Amendment that explicitly mentioned male and only male citizens).
* GrowingTheBeard: Most agree that ''The Titan's Curse'' was where the series really began to show its quality.
* HarsherInHindsight: Percy catching Annabeth [[spoiler: when she nearly falls off Olympus becomes cringe worthy after the events of the third ''Literature/TheHeroesOfOlympus'' book, ''Mark of Athena'', where he catches her again while she's being dragged by Arachne's threads into Tartarus and this time around, he chooses to fall with her.]]
*** Promise (which seems to be the ArcWords in Luke's life), after reading ''The Diary of Luke Castellan''.
** The tense relationship between Nico and Percy becomes downright [[TearJerker depressing]] after ''House of Hades'', [[spoiler: where it's revealed he was hiding his true feelings from him.]]
* HilariousInHindsight: "She made ''blue waffles'' and blue eggs for breakfast."
** Tyson, a teenage boy, has a [[PeripheryDemographic fondness for]] [[WesternAnimation/MyLittlePonyFriendshipIsMagic ponies]].
*** For that matter, the fact that he named a hippocampus he developed a particular attachment to "Rainbow."
* HoYay: Percy and Nico share a bit of this in ''The Last Olympian''. Luke and Percy do, too, particularly in [[BigBrotherMentor the first book]].
** [[spoiler: And then in later books, it turns out that Nico actually has/had feelings for Percy.]]
** Travis and Connor Stoll (from the Hermes cabin). Percy and Tyson, too, but the Stolls are [[HeterosexualLifePartners almost never without each other]].
* InferredHolocaust: In the first book when Percy, Annabeth, and Grover face Hades, the god of the dead becomes so enraged that he causes not one but two earthquakes, and Percy remarks that it will not have been a peaceful night in L.A. When the kids resurface, Los Angeles is ''burning''. No casualty numbers are given, but it could qualify as a [[FunnyAneurysmMoment Funny Aneurysm Moment]], as Hades had just finished complaining about how the Underworld was overcrowded and didn't need more subjects. Kinda ironic.
** Manhattan sounds pretty bad by the end of the last book. [[spoiler: Everyone had fallen asleep, which probably includes people who were cooking things, people who were in the hospital getting surgery, etc. And Fifth Avenue is a disaster.]]
* IKnewIt: Who is the lightning thief? Could it possibly be [[spoiler:Luke, the swordsman who is a son of the god of thieves, and has a scar running across his face?]]
* LesYay: Silena and Clarisse, Annabeth and Thalia, Zoë and Bianca.
** Zoë and Artemis, one-sided on Zoë's part, arguably.
** Clarisse and Silena in particularly considering they play out the relationship between [[spoiler:Achilles and Patroclus]] to its tragic conclusion. And we all know about ''them''.
* MagnificentBastard: Kronos
* PeripheryDemographic: Because of Riordan's [[ShownTheirWork attention to detail]], some people who're outside the target demographic of young adults find enjoyment in these works.
* RewatchBonus: For those that read the [[Literature/TheHeroesOfOlympus sequel series]], every single scene regarding Nico and Percy takes on new meaning once you learn [[spoiler:Nico had a crush on Percy since the day he was rescued]].
* TheUntwist: The fulfilling of the prophecy in ''The Titan's Curse'' It says "One will be ''lost''" and everybody assumes it means someone will die. But it never outright states dying, so with the usual ProphecyTwist you could expect [[spoiler: Bianca to be lost and later found. It turns out she gets KilledOffForReal.]]
* TheWoobie: Everyone not named Gabe, Ares, or Kronos.
** Luke's [[spoiler:mother, May Castellan]], also deserves a special mention here.
** In ''The Last Olympian,'' the narration actually says that Hermes "looked like he needed a hug." If that's not baiting woobiedom, nothing is.
** MRS. JACKSON. Ridiculously nice, sweet, and caring, and yet gets get stuck with an abusive slob of a husband and serious financial problems. [[spoiler: Luckily, things get much better.]]
** Even '''Dionysus''' has a little of this after he revealed his relationship with Ariadne to Percy in the third book, and after [[spoiler: one of his sons die]] in the fourth book.
!!Tropes which only apply to the film:
* AngstWhatAngst: Percy seems to handle [[spoiler: the sudden death / disappearance of his mother]] very well...
* AntiClimaxBoss: [[spoiler: Kronos in ''Sea of Monsters'', possibly intentional because the rest of the books might not be adapted to film.]]
* BrokenBase: Whether or not Annabeth counts as a FauxActionGirl. Those who claim she is point to the fact that she has to be saved from Medusa by Percy, doesn't figure out the Lotus hallucination until after they're outside it and then does nothing in the climax - despite claiming to have lots of experience with battle strategy at camp. Those who say she isn't point to her beating Percy in their first duel (and he needs a power boost from water to match her), being the one to use CarFu against Medusa, successfully shooting some guards and the hydra and merely being OvershadowedByAwesome - since only one person can wear Hermes's sneakers. RuleOfCautiousEditingJudgement really applies here.
* EvilIsSexy: Medusa. Of course, she ''is'' played by Uma Thurman.
* FollowTheLeader: This adaptation has Kronos as the main antagonist despite not being in the book. Kronos' "Titan made of lava" appearance is also reminiscent of [[Film/ClashOfTheTitans a recent movie about demigods]].
* HamAndCheese: While Uma Thurman and Steve Coogan are only briefly in the film, they do manage to make their respective scenes ''awesome''. (See OneSceneWonder below)
* HilariousInHindsight:
** In the Japanese dub of the films, Percy is voiced by Creator/MamoruMiyano, who also later voiced [[Anime/{{Free}} Rin Matsuoka]]. Extra hilarity that, in RealLife, Miyano ''[[IDontKnowMortalKombat doesn't know how to swim]]''. Even more ''extra hilarity'' he voiced [[Manga/DeathNote Light Yagami]], a guy who wants to become a god, not to mention he dubbed another guy [[Film/HarryPotter named Percy]].
** Goes UpToEleven with Creator/TesshoGenda as Zeus: he is the Japanese dub voice of ''[[VideoGame/GodOfWar Kratos]]'', who wants to ''kill'' his father '''Zeus'''.
* LoveItOrHateIt:
** Both films. Some fans detest them due to how different they are from the book, others regard them as bad adaptations but decent enough films.
** ''The Sea of Monsters'' film. Some thought the movie was worse than the first, others thought it was better and more entertaining.
* NightmareFuel: The scene in Medusa's shop. While it isn't that creepy in the book (there the scene is a lot less ominous up until the Uncle Ferdinand bit), the movie added a panicking woman whose husband had already been turned to stone and she's hysterical with fright. She eventually gets turned into stone too, and the only mention that's made of it is when Annabeth explains how she scraped her wrist (the woman had been holding her wrist when she had been turned to stone and Annabeth had to pull her hand free).
** [[spoiler: Kronos' resurrected body in the second film is rather terrifying. [[FromBadToWorse And then he starts swallowing Half-Bloods whole]].]]
** Despite all the comic relief going on around them, the inside of Charybdis is still a disturbing location. We see that the monster ''digests'' its food by mashing it with gigantic, fleshy mallets.
* OneSceneWonder: Uma Thurman and Steve Coogan in the first film. Nathan Fillion in the second.
%% SoOkayItsAverage
* TheyChangedItNowItSucks: Most fans tend to regard it as a disappointment. Even Rick Riordan himself said he didn't see any of the movies.
* TheyCopiedItSoItSucks: Most people who weren't fans of the book, just wrote the first movie off as a rip off of ''Franchise/HarryPotter''.
* TheyJustDidntCare: The only similarity between the film and the book is the main plot line, which was heavily condensed, along with a number of cut content.
* UnfortunateImplications: Grover's characterization in the film was such a nonstop barrage of black stereotypes that it lead [[http://msmagazine.com/blog/blog/2010/03/08/percy-jackson-minstrel-show/ one person to liken it to a minstrel show.]]
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