These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Common Knowledge: I have never associated with that pyschopath Sabertooth (in fact when his rivalry with Wolverine started to become part of his character I was currently part of the X-Men), The Juggernaut, or, in spite our similar goals the shapeshifter Mystique. Despite this, fans have this perception that I've worked with them, to point where in the Ultimate Marvel universe, Juggernaut works for me and is a mutant.
Foe Yay and/or Ho Yay: Fans have seen this between Xavier and I in our many incarnations. Their speculation is of no concern to me.
Hilarious in Hindsight: As listed above, several fans have seen...subtext between Xavier and I in various media portrayals, including the 90's cartoon (especially, I am told, in the series finale). Ian McKellen, who portrays me in the live-action films, is openly gay.
Kick the Dog / Moral Event Horizon: The one most heinous evil I had been forced to commit that still happened and wasn't Retconed into non existence was in "Fatal Attractions", wherein I unleashed a global electromagnetic pulse that wiped out electronics everywhere on Earth, crippling humanity and by extension, any mutants that chose to remain there, as well as painfully and meticulously ripping the adamantium from Wolverine's living bones.
Jerkass Woobie: Many people accuse me of being a genocidal maniac, and hold the high number of casualties of my quest for mutant freedom against me. Nonetheless, they still pity me after all the ways in which I have been wronged by the human oppressors.
Memetic Mutation: It appears that to a sorrowfully huge subsect of humans, I am little more than a collection of catchphrases and mannerisms rather than a living, breathing being of flesh and albeit mutant blood. Even worse still is that red clad madman seems to agree with them and won't ever let me avoid this cursed fate.
"Mag-Fuckin-Neto!" (Explanation Some loud, brash homo sapien fool only calling himself Yipes screaming this vulgar version of my name out upon watching a video of me doing battle.)
Ascended Meme: Deadpool:"I just beat Mag-freakin-neto! Where yo curly mustasche at?!" (Explanation The same human, this "Yipes", has equated me to Pringles: a mundane commercial foodstuff. The Pringles slogan "Once you pop, you can't stop", is an allusion to the fact that once I get going on my enemy, I don't stop until they are dead, and the mascot of the Pringles brand is a man with, of course, a curly mustache.)
"X-Men! Welcome... TO DIE!!!" (Explanation A Japanese subsect of humans seeing fit to portray me as a one-dimensional idiot in a bucket and cape, largely incapable of stringing a coherent sentence together, notably in a scene where I launch a blast at the X-Men that sends them whirling into a trap. Amongst other things they claim me to shout when engaged in battle with the X-Men.)
My Real Daddy: Though Stan Lee and Jack Kirby first told my tale, it was Chris Claremont who first told my side of the story, explaining my tragic childhood, my complex motivations, and my three-dimensional nature, rather than treating me as just another generic comic book villain.
Never Live It Down: Sadly, the chances of homosapiens ever letting the "Wooden Gun" thing go are pretty slim.