- Acceptable Targets: New Age Retro Hippies, anarchists, rednecks, enviromentalists and religious fundamentalists.
- Accidental Innuendo: Xavier has a knack for this trope. For instance, in one episode, a prehistoric woman tells Xavier her husband beats her because he loves her. Xavier responds "If that's love, I'm going to make some love to his mouth!"
- Alternative Character Interpretation: Is Xavier operating on a level beyond our understanding, or is he just some douche who doesn't have the slightest idea what he's even saying most of the time?
- Bizarro Episode: It might seem impossible considering how Mind Screw the show is even at its most normal, but "Damnesia Vu" and its Sequel Episode "Damnesia You" take the weirdness to a whole new level. It's hard to properly describe in words, but both forgo any kind of plot altogether and instead just having Xavier go through various doors into alternate universes, none of which make any sense at all, only to find himself back in the room where he started, with no explanation.
- Broken Base: Xavier picks up a notably wackier voice in-between the first and second seasons. Some people don't mind it, while others prefer Xavier's more sage-sounding, deadpan delivery in the first season.
- Crosses the Line Twice: In episode four, Xavier doesn't eat a baby. He eats seven, pulls out one of their skeletons, makes a herd of bloodhounds tear an eighth baby to shreds, turns in to a fetus, gets electrocuted, transforms into an egg, hatches, promises to put babies in a stranger's butt and sticks his tongue down her throat. It's even weirder than it sounds.
- In the episode before that, a kid's father is blown up, but the explosion is brought to life and becomes one with the kid's father. It's a little creepy. Then the kid stabs the explosion to death with a knife to keep his promise to his mother not to be another Einstein, and it's surprisingly poignant. Then Xavier rips the explosion's heart out and eats it, and it's hilarious.
- Heck, just the entire show really.
- Cult Classic: Has become one in The New '10s due to just how damn quotable it is.
- Ear Worm: The somber opening theme music might stay in your head for quite a while.
- Fandom Rivalry: Though it's hard to tell how serious it is, the fandom developed a fierce rivalry with Rick and Morty, bashing R&M and its fans for being edgy atheist faux-intellectuals while Xavier is truly intellectual and deep. Apparently for acknowledging that being intellectual and deep and also preachy is shallow. Whether it's genuine or not, the rivalry somewhat succeeded in causing a resurgence of interest in the 10+ year-old show.
- Fountain of Memes: Xavier's bizarre ramblings are extremely quotable.
- Genius Bonus: Xavier dresses up as a ghost to scare people, saying things like "Boo!" and "I'm scaring you!" Thing is, "boo" is actually conjugated Latin—the word "boare" means "to scare/alarm", so the word "Boo!" literally translates out to "I am scaring!" The YMMV comes in when you wonder how intentional that was.
- Hilarious in Hindsight: The scene where the camera zooms down the throat of Xavier's snake-hand to reveal a live baby has led many people to jokingly suggest that it was the inspiration for Death Stranding.
- Nightmare Fuel: There's quite a bit throughout the series, though what really takes the cake is the ending of "Signs from Godrilla", where Xavier is eaten alive by a mob of people.
- The whole show can be this. See Uncanny Valley below.
- Squick: Hoo boy. Damn near every episode. One episode involves Xavier repeatedly turning himself inside out.
- Ugly Cute: Despite being a creature with a beak, snake hand, six nipples and backward knees in the Deranged Animation sense, Xavier still has a decent following of people who find him rather...appealing. Just look at the fanart.
- Uncanny Valley: The intentionally low-quality CGI makes everything seem like a bizarrely unconvincing imitation of reality, be it places, objects or people. Xavier might actually be the most normal-looking thing in the show, as he's sufficiently cartoonish-looking that he never gives off that feeling of unreality. Part of the reason for the trippy feel it has (besides, y'know, everything else).
- What Do You Mean, It Wasn't Made on Drugs?: Surprisingly, yes.
YMMV / Xavier: Renegade Angel