From the Magneto discussion.
When I’m putting Hulk in front, I often say “Make me angry.” Does anyone use catchphrases while playing other characters?
It’s not Marvel, but I’ve been feeling Arthur’s (from the Tick) battle cry a lot during Heroic Venom: “Not in the face, not in the face!”
I hear “Snikt!” in my head everytime I activate one of Wolverine’s (any flavor) attacks.
Whenever my Hulk takes out Thor or Loki: “Puny God.”
“Ticker tape parade” any time there’s a series of cascades after the other team is already dead.
“Hulk smash!” always came to mind when he flooded the board with passive tiles. Not so much anymore now that he has high level/health. 
I now say tinykitty in everyday conversation, expecially when I’m getting my butt handed to me by a node.
I liked every one of the replies. Good stuff. My inner monologue while playing will be much more entertaining now.
Usually I just tell the AI that can’t hear me to F off.
This doesn’t apply to the game or to The Tick.(Great show btw) But you say Not in the face, I say… “Phrasing”
Archer has taken over my life.
When using Storm, I’m always tempted to recite one of her dramatic speeches from the 90s animated series - for example:
However, as I’m mostly on a crowded train when playing, I think better of it…
I say “Thwip!” when using Spidey’s webshooter while also making the finger thingy 
Back when Rags was god, my inner monologue used to sing “Here comes the BOOM!” ala P.O.D whenever I used 2AP Thunderclap.
Although, I’m not sure if anyone would even remember P.O.D. God I feel old.
Ready or not, How do you like me now ? 
I say cowabunga whenever I get the first piece of a really cheezy pizza. Or did you mean in game?
Not a catchphrase but I have done the finger gun when using Punisher’s Retribution.
Bang.
I don’t know why I think of Sheldon when I win with him but… Bazinga! …when I win a match with Loki
Also, whenever I form an all X-men team I hum the theme song to the animated series 
Hopefully you mean xmen:the animated series (90s cartoon). Also, the “pryde of the xmen” intro song is pretty awesome too. Love that video as a kid (was actually a pilot for an attempt at an xmen show that wasn’t picked up prior to the xmen: the animated series run).
It’s so amazing to think what things were like in the early 90s, having to luck out finding a cool video in a grocery store or a video store. For every prude of the xmen there was a weird creepy kids show and for every Bucky o’hare there was…well Bucky… captain Bucky O’Hare was unique. It taught me the word indignation at a very young age. Anyway, you van now just jump on YouTube and BOOM. Pryde of the xmen for free in all its glory. Give it a watch if you’ve never seen it. What a difference a short 10-15 years can make.
draw Doom like one of your French girls!
Every time Thor uses his red or yellow ability I go: “Hammer to the face!”, paraphrasing the infamously known “Knife in the throat!”