* SugarWiki/AwesomeMusic: Several, to wit:
** Both [=OPs=]. ''X'' Made more awesome by the fact that they don't start until after [[PreviouslyOn the recap of the last few minutes of the previous episode]], cliffhangers and all. The soft tones of Dreams paint the uncertainity of living in a world ravaged by war very well, while Resolution and its' HotBlooded rhythm will certainly pump you up like few other Gundam songs do.
** And things went even more HotBlooded once [[Music/JAMProject Masaaki Endoh]] did a remix of Resolution in the Lantis Gundam Tribute.
** [[https://www.youtube.com/watch?v=Xy8PupWFS9E The first ED]] (it's in English and it features that guy who started and finished "Voices That Care", dood!)
** A lot of the [=BGMs=] that play whenever battle is joined. The [[{{BFG}} Satellite Cannon]]'s eponymous track is one great example.
* BigLippedAlligatorMoment: In episode 2 and 3, it's established that Tiffa can feel the pain mobile suit pilots endure when they die in battle. But after that, it's never shown, brought up, or even mentioned ever again. Even during places where it should have been activated, it doesn't.
* CompleteMonster: [[FantasticRacism Seidel Rasso]] is the leader of the Space Revolutionary Army. In the aftermath of a war that nearly wiped out humanity, Rasso became the leader of the twelve million people living on the colony of Cloud 9. Turning it into a PoliceState, Rasso suppressed all dissent, and preached a philosophy founded on the notion that since Newtypes could only be born in space, the colonists, rather than the people of Earth—called Oldtypes--should control the destiny of the human race. Knowing this to be false, Rasso also kept all information about Newtypes on Earth quiet, while gearing up for another war. Destroying the rebellious colony of Satelicon, including its largely civilian population, with photon torpedoes in order to consolidate his power, Rasso had his spy, Nichola, [[BadBoss arrested and summarily executed]] for [[EvilIsNotPacifist suggesting peace talks]] with the New Earth Federation, and tried to use a KillSat to exterminate those humans remaining on Earth. When the supercomputer DOME revealed that Newtypes were really no different from the rest of humanity, Rasso [[IgnoredEpiphany refused to accept it]], even as his ArchEnemy, and ardent Newtype hater, Fixx Bloodman of the New UNE reconsidered his own position. When the Frost Brothers violated the ceasefire between the New UNE and the SRA, Rasso's last act was to join in the renewed conflict, ranting about how Oldtypes were all scum who deserved to die.
* CriticalBacklash: Having the infamy of being the only Gundam show after [[Anime/MobileSuitGundam the original]] to be CutShort lead to a stigma of being particularly bad. The actual reasons for being canceled early stemmed from franchise burnout, being the seventh Gundam show in ten years and the fourth consecutive Gundam show as well ([[ToughActToFollow following Gundam Wing didn't help much either]]); the franchise since then has been more careful about spreading their content apart. Most fans upon revisiting this series find it respectable, just released at the wrong time.
* CultClassic: Widely considered to be among the best alternate universe ''Gundam'' entries by those who have seen it, yet it's nowhere as well known as ''[[Anime/MobileFighterGGundam G]]'' and ''[[Anime/MobileSuitGundam00 00]]'' are amongst Western fans.
* FanNickname:
** The Frost Brothers Shagia and Olba are referred to in certain circles as the "Frosties".
** Due to his jacket, Garrod is known as "the Pizza Delivery Boy".
* FashionVictimVillain: Shagia looks alright with his frilly shirt and coat, but Olba's jacket and boots clash real bad.
* GermansLoveDavidHasselhoff: Despite [[NoExportForYou not actually getting an official release of the series for years]], American Gundam fans seem to appreciate ''Gundam X'' a great deal more than Japanese fans did. As of June 7, 2016 this was rectified with an official English Subbed DVD release. April 2020 then brought an official subtitled Blu-ray release.
* HarsherInHindsight: A meta-textual example. When the show first came out, the whole concept of [[spoiler:"drone weapons controlled by one person to cause mass destruction"]] (something also discussed by the "Mobile Dolls" previously in ''Anime/MobileSuitGundamWing'') seemed a little out there, and perhaps contributed to some of the trouble Japanese fans had suspending their disbelief. Come TheNewTens, and all of a sudden the aforementioned seems '''''creepily''''' prescient more than anything, and gives the whole show a lot more teeth in its messages.
** A story example would be [[spoiler:Shagia's fate in the anime where he's crippled in a wheelchair. Olba may be a KarmaHoudini on the surface but when one remembers that he can feel Shagia's pain sometimes, this means that Olba will share the physical pain Shagia feels while he is crippled]].
* HilariousInHindsight: Garrod using the Satellite Cannon can be as such, if you take into account his [[Creator/WataruTakagi Japanese voice actor]] is the defacto voice actor for ''WesternAnimation/DaffyDuck'' in Japan, except Daffy is ''always'' at the receiving end of the attack, rather being ''the one'' doing the attack this time.
* LesYay: Ennil El and Toniya. First, Ennil gives Toniya a nice dress as a gift. Then, when Toniya wears the dress to dinner with Ennil, Witz assumes it's a date and she's teasingly ambiguous about it. (Granted, they spend part of their "date" talking about their romantic prospects with men.) Later, when Ennil [[spoiler:betrays the crew]], she tries to make sure Toniya will be safe. And in the GrandFinale, [[spoiler:Ennil and Toniya ditch their new boyfriends Roybea and Witz to drive off together]].
* MemeticBadass:
** Jamil with his UC-hero-patchwork-persona, with HotbloodedSideburns added.
** Also Garrod and Tiffa as a "Memetic Sweet Couple".
** Garrod's EstablishingCharacterMoment has given him this status. Really, what main character introduces himself by hijacking a giant robot with a grenade and a gun?! That's how awesome he is!
* MemeticMutation: See Memes.{{Gundam}}
* {{Moe}}: Tifa Adil. Notable in that she had a lot of these traits before the term was really codified, and may have contributed ''to'' codifying it, alongside [[Anime/NeonGenesisEvangelion a few of]] [[Manga/CardCaptorSakura her contemporaries]].
* TheScrappy: Olba Frost, the younger Frost, is ferociously bashed by fandom for supposedly being a male {{Yandere}} with a brother complex. Even his voice actor hates him - apparently, the role even gave him logomisia toward the phrase "Nii-san.". The only positive thing people can say about Olba is that his Gundam Ashtaron looks pretty cool.
** Mitigated somewhat when some fans drew parallels to this series and ''[[Webcomic/{{Hiimdaisy}} "Let's Destroy Metal Gear!"]]'', with Olba as Liquid (same VerbalTic) and Shagia as Ocelot (same penchant for backstabbing).
* TearJerker: Tiffa's drawing of herself and Garrod [[spoiler: getting burned when the Frieden is attacked at the end of episode 30.]]
** In the episode afterward, Garrod breaking down in tears upon finding what's left of it, especially [[spoiler: since he saw Tiffa get kidnapped and forcibly taken to space and couldn't save her.]]
* TheyWastedAPerfectlyGoodPlot: Even among people who love Gundam X, the series is still criticised for not really using its post-apocalyptic setting as much as it could have. Other than tying into the show's theme of letting go of past conflicts, all the After War setting really offers X is random bandits used as mooks in the show's early part and is almost completely dropped by the second half in favour of continuing the struggle between the UNE & SRA and offering meta-commentary on the Universal Century.
* ViewerGenderConfusion: Carris. The fact that his voice actress is none other than [[Anime/DigimonAdventure Sora Takenouchi]] herself isn't helping matters.
* VindicatedByHistory:
** To some extent. While it has received an HD remaster last of the main Gundam TV series, it has gotten a number of "posthumous" high-quality Gunpla model kits that have all done quite well, its followup manga did ''quite'' well for itself, and in general the show is well-regarded on both sides of the Pacific by critics and fans at this point.
** In particular, it's become a popular mainstay of ''VideoGame/SuperRobotWars''; its appearance in ''VideoGame/SuperRobotWarsAlpha Gaiden'' helped spur re-examination of the show, and the ''massive'' involvement of the show and characters in ''VideoGame/SuperRobotWarsZ'' (straight down to getting the actors to come back into the studio to record an '''irregular''' number of new lines) has been largely due to fan demand.
* TheWoobie: Tiffa. Prior to her being rescued by the Frieden crew, she was subjected to numerous experiments by a certain post-war corporation just for them to understand the power of Newtypes.