* SugarWiki/AwesomeMusic: Pretty much all of ''Mars'', ''Rebirth'', and ''Crescent'', especially "Birdcage," "Oasis," and "Orenji no Taiyou." Single-only songs include mentions also go to "Cube," "Blue," and "Uncertain Memory."
** Although NEVER to replace ''Ai wo Torimodose'' as ''Manga/FistOfTheNorthStar'''s iconic song, the song for ''New'' is widely recognized by fans as the best song the series had since.
** "Until The Last Day" is an awesome battleworthy theme.
* FandomRivalry: Gackt vs. Mana. This one has some very deep roots and enough anger and bitterness to go around for all, to the point where it has resulted in many a FlameWar, and unlike many other such events and scenarios, both parties still actively hate each other. Gackt fans will see Mana as an egotistical perfectionist who destroyed his band for the sake of a personal feud, and Mana fans will see Gackt as the egotistical band-destroying {{jerkass}} who screws over nearly everyone with whom he works at some point and Mana being the only one with enough balls to call him on it and kick him from the band before he left.
* FanNickname:
** His fans and staff sometimes refer to him as "Maou-sama". Which is Japanese for "Devil King."
** He is also known as "Gacchan," "Gakkun," and other such variations, particularly by his Japanese fans.
** He has recently been given nicknames like "Troll King" and "Troll Aniki" for his habit of trolling his fans.
* MemeticMutation: A dark version of this. Gackt's decade old joke about being a 496 year old vampire has been quoted out of context for so long that even presumably legitimate news sources have treated this as a serious belief of his. He has since corrected this at the Nemuri Kyoshiro press conference, where he released his actual age to the public so the joke would die.
** Also, within the fandom: his love of Music/{{Hyde}}, his pronounciation of the word "fire"[[note]]from a Kirin commercial in which he covers Music/StevieWonder's "To Feel the Fire"[[/note]] and his unceasing use of the word "dakishimete" (抱きしめて, "hold/embrace me/it") in nearly every song he has ever written are memes.
*** ''"I need joh '''fiyaa fiyaa fiyaa''' to keep me wahm / I gah too fill za '''fiyaa''' / Tu keep me wahm, I gah to feel it...'''fiyaaaaaa!!'''"
** ''Franchise/KamenRider'' fans got a lot of mileage from the Gackt card shown at the end of the [[Series/KamenRiderDecade Journey Through the Decade]] music video, since it [[BigLippedAlligatorMoment comes out of nowhere]] and results in Decade [[StuffBlowingUp exploding]].
* SuspiciouslySimilarSong: "Vanilla" sounds awfully similar to "Livin' La Vida Loca" by Music/RickyMartin.
* ViewerGenderConfusion: Show someone who has never heard of Gackt a picture of Gackt. Odds are they will not figure out his gender.
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