The Cast Showoff: Averted. Garrett himself actually sings and plays guitar in a small band called Emrus but never actually performs songs in his videos, unless they're meant to be intentionally bad joke songs.
Caustic Critic: Mostly subverted. While he is quick to point out flaws in a movie and tear them a new one, he is willing to acknowledge when they might get something right.
Later pariodied in his April Fool's Day video, where the character goes through an identity crisis and a split personality tries to give Il Neige a Hannibal Lecture about his "lack of originality," but thankfully, Il Neige does snap out of his Heroic BSOD.
Mauve Shirt: Points out how this wasn't handled well in Atlantis: The Lost Empire in the scene when the other characters just sum up their life stories immediately after the big action scene without giving the audience a chance to attach themselves to the characters first.
Il Neige: "Honestly, the leviathan could've killed off any one of these characters, and I wouldn't miss any of them because I didn't know anything about them."
Viewers Are Morons: He especially hates it when works aimed at kids talk down to their audience and/or are condenscending in manner (such as the musical segments being mediocre to bad just because they're aimed at children).