* AlternateCharacterInterpretation:
** Yuuko's wish being revealed to be Watanuki to continue existing [[spoiler:after her vanishment]], considering how biasé and occasionally fatalist she is about deaths, opens an interesting debate. While it's clear that the witch came to appreciate and love his worker despite all their quirks, the nature of her feelings is less clear about whether they were mentorly/platonic o more romantic in kind as Yuuko/Watanuki shippers defend.
** Similarly, Watanuki's decision to [[spoiler:wait for her during all the eternity]] seem to be quite significant on how important she was for him, considering he chose to devote his life to it despite the presence of more conventional love interests like Himawari and (see Ho Yay) Doumeki.
* {{Anvilicious}}:
** Some of the scenarios are {{Family Unfriendly Aesop}}s.
** The time Watanuki defends the spirit of an unborn girl from the personification of abortion.
* BaseBreaker: Watanuki was at first this due to how irritable and histrionic he is. Some found it funny and endearing, while other saw him as annoying and unsympathetic. After his CharacterDevelopment, however, the fandom got unanimous about him.
* BrokenBase:
** There are those who solely enjoy the manga but dislike how ''Manga/TsubasaReservoirChronicle'' intertwined with the plot, particularly with Yuuko's and (especially) Watanuki's pasts. The problem gets worse as in order to understand it, they have read the other manga, which is [[MindScrew problematically confusing]] of his own.
** The manga's ending divided people. Some people believe that the series should have ended with Volume 16 as the last chapters did not build up anything to the story. CLAMP themselves acknowledged people's reaction to the ending and were happy since some wondered about Watanuki's fate.
** ''xxxHOLiC: Rei'' also divided the base. Despite that Yuuko is back, some people still find it more of a rehash of the earlier volumes without any new input on the story [[spoiler: at least until the nature of the setting was revealed.]] Then, it went into a hiatus just to make room for ''Tsubasa World Chronicle'', which anger several readers. And despite that the two mangas are still connected, some readers felt that Watanuki and rest would only get some cameo appearances. In April 2015, the manga went back to publication, though its schedule is somewhat sporadic and it still continues to leave many readers with mixed feelings.
* CargoShip:
** Shamisen/[[spoiler:Plectrum]]. Which technically isn't a cargo ship since it's actually [[spoiler: cat/butterfly]]. Maybe. It gets confusing when their human forms look like their owners. And it only gets more confusing when you realize that the bit of the [[spoiler:plectrum]]'s form we get to see looks very much like a certain [[AmbiguouslyGay dead]] [[SuddenlySexuality exorcist]].
** The only universally accepted pairing within the CLAMP fandom is apparently Larg/sake.
* EarWorm: [[https://www.youtube.com/watch?v=4OP4k3KC-dw 19Si by Suga Shikao]] is pretty much guaranteed to nestle itself in your brain for days on end.
* FanficFuel: There would also be a fanfic of a CLAMP or non-CLAMP character visiting the shop. Or for being a [[DimensionLord Dimensional Witch]], Yuuko is aquainted with other dimensional travellers (such as [[Franchise/DoctorWho the Doctor]]) or wizards (such as [[Franchise/HarryPotter Dumbledore]], [[Franchise/TheLordOfTheRings Gandalf]], etc.)
* FunnyAneurysmMoment: All Watanuki's wailing in earlier chapters about how [[spoiler:his service at the shop kept getting prolonged and was NEVER GOING TO END]]? ''Yeeaah.''
* HollywoodHomely: Watanuki, considering he's not particularly popular with human girls, but certainly isn't ugly to say the least. To be fair, the reason he isn't popular with girls probably has more to do with his flailing and screaming at things no one else can see than his looks.
* HoYay: Once again, it's Creator/{{CLAMP}}. There's subtext not only between Doumeki and Watanuki, but also between Watanuki and ''Haruka'', who he is much more willing to admit fondness for. In the first's case, Creator/{{CLAMP}} is certainly pushing "subtext" to its limit - hell, recent chapters have Doumeki and Watanuki alone in a bedroom, with Watanuki [[CrossDresser wearing a loose kimono]], discussing about the ''mating habits of cats'', and what it needs for the ideal mate and love; not to mention the above statement on how much Watanuki resembles a cat.
** Judging by the hints given in ''Rou'' [[spoiler:ten years or so have gone by, Himawari is married and only visits the store once a year, while Doumeki and Watanuki spend almost every afternoon together. Doumeki goes out to work, brings the groceries, Watanuki cooks and serves the food, then they talk about anything while Watanuki bends around the floor with his clothes almost falling off.]] Their relationship seems to have almost completely become that of a married couple if it weren't for Watanuki somehow managing to remain rather ambivalent.
** The latest chapters have become increasingly homoerotic, such as when [[spoiler:after granting a ghost woman the wish of being reunited with her long lost lover, Watanuki recieved an umbrella as payement and; while explaining to Doumeki that finding a beautiful woman under an umbrella is an amazing discovery for any man, he walks femininely under said object and winks at his friend.]] Whether this is Creator/{{CLAMP}}'s subtle way of messing with our minds or something more remains to be seen, and most probably never will.
** On the [[LesYay opposite end]], Yuuko is a wee bit touchy-feely with one of the early clients, as well as the twins in one of the earliest chapters (even kissing one of them.)
* MoralEventHorizon: If hurling a cup of boiling hot water at Watanuki for daring to befriend Kohane doesn't turn her mother into an irredeemable bitch in the eyes of the reader, then [[spoiler: hitting Kohane on ''national TV'']] should do the trick.
* OneTrueThreesome: A small minority of the fandom is quite dedicated to the Doumeki/Watanuki/Himawari threesome, due to the ways the three of them have been built to compliment each other and interact throughout the series. A decent amount of the fandom at least holds some fondness towards the trio and the Live Action Drama based on the series also decided to give their relationships the strongest focus.
* ParanoiaFuel: The new series ''xxxHolic Rei'' is responsible for this. The choice of setting [[spoiler:including Yuko alive and Watanuki as his assistant even though the original the series ended with Yuko dead and Watanuki as the shop's owner is leading many people believe that the entire series is about Watanuki escaping from reality. Latest chapters appear to hint this as Yuko and Domeki, and later even ''Himawari'' are shown to be aware of Watanuki having to make an important decision while in chapter 23 Watanuki even talked like his ''xxxHolic Rou'' persona much to his and the readers' confusion.]]
** [[spoiler: As of the latest chapters it's been revealed that Watanuki's subconscious, in the process of gathering some things for Syaoran from another dimension, had accidentally created the setting to emulate the time in his life when he was happiest, and that out of concern for his wellbeing, Himawari and Doumeki decided to follow and watch over him. Yuko on the other hand is heavily suggested to be a projection created by him, although it also seems that she in of herself developed a will identical to the "true" Yuko, enough so that one cannot be truly certain who or what she really was.]]
* TheScrappy: Himawari is not only seen this by fangirls due to DieForOurShip but most readers in general due to how irrelevant she is to the storyline. She is RescuedFromTheScrappyHeap in ''Kei'' when her background is revealed.
* ShipMates: Watanuki/Yuuko shippers often support as well Clow Reed/Yuuko, citing Watanuki's resemblance to [[spoiler:his late ascendant]] as the reason of their own ship.
* ToughActToFollow: ''xxxHolic: Rei'' tries to recapture the great things that the early ''xxxHolic'' volumes had [[spoiler:which includes the return of Yuko as the shop owner]]. Alas, [[BrokenBase the fandom is very divided with it]], and sales are understandably lower than the old times.
* UncannyValley: Occasionally the TV animation (and ''especially'' the movie) slips into this. One reader of ''Anime Insider'' wrote in after they featured Yuuko on the cover and asked, "Why did you put a sexy zombie on the cover?" (referring to [[http://www.animepaper.net/gallery/scans/xxxHOLiC/item93367/ this]] image) and managed to just about sum up most people's grievances with the art in one sentence, while [[spoiler:[[FunnyAneurysmMoment simultaneously spoiling a major plot point unintentionally]]]].
* WholePlotReference: A CLAMP manga about a nervous, irritable guy with a mysterious background and the ability to see supernatural things, who works obligedly in a quirky shop for a sexy, worldy boss fulfilling weird jobs and missions related to the spirit world, often aided by an imperturbable guy with supernatural powers and a lot of subtext? Are we talking about ''xxxHolic'' or ''Manga/LegalDrug''?
* TheWoobie: Nearly every major character is a woobie in some form or another, Watanuki, Kohane [[spoiler: and Himawari]] being the most prominent examples.
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