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.
Despite being drugged by a cult and effectively raped by Maggotbone Sr. and the occasional night terrors she experiences, Callie's mom feels no ill will towards either party and is implied to have at least tried to pursue a relationship with Maggotbone before leaving to raise Callie (whom she adores) on her own.
This was retconned in "Callie's Little Sister" - turns out she was dating Frank Sinatra, and Mack (Callie's father) offered to impregnate her in exchange for her soul, and getting him out of his Arranged Marriage with Twayne's mother, Violet.
Doug. Started as just another person at Mark's workplace that criedonce an episode. Then became Mark's assistant and now has an expanded backstory as a Bolivian assassin trying to start over.
Callie Maggotbone. She'll definitely show you her softer side.
Her sister Lilith counts as well, being arguably hotter than Callie. Or just the flaming eyes.
Fan Preferred Couple: Given the rampant amount of Ho Yay between them, Randall/Mark is pretty popular in fan-art.
Hilarious in Hindsight: The Manbirds have developed a distinct and complex language built around American obscenities after a traveler taught them all how to swear. Funny enough on its own, but couple that with newsreports of wild parrots in Australia incorporating expletives in their calls (having learned them from domesticated parrots) and you have a textbook case of life imitates art.
Mark: I really wish I had that information before I turned into a girl. Randall: Well it might not be a total loss. You could make a long-time fantasy of mine come true.
Another mark for Randall and Mark: "Your denial's really turning me on. Is that weird to say?"
Twayne with Leonard's nemesis in "Kill, Mark...Kill!"
The entire Randall/J9 sequence in "Soulsucker", culminating in Randall rubbing a hand over J9's crotch.
The Ho Yay between Randall and Mark is taken Up to Eleven in "Mummy Dearest", with their lease agreement becoming an analogy for marriage - to the point that Mark proposes at the end of the episode, and Randall hangs a pretty heavy Lamp Shade on it.
Randall: Well, I kinda wanted to the guy in this scenario... but yes!
Moral Event Horizon: Twayne crossed the line absolutely when he kills his brother to usurp his rank as general, gets worse when he rebels when he was a baby, he killed all his brothers.
The whole episode this was revealed in turned out be a giant act, Twayne might not really have siblings.
Callie's giant demonic form. Not something you want to meet in a dark alley, or even a lit one.
Callie's demon form must be pretty tame compared to others since we don't even get to see the face of Lilith's demonic form—who is also about 10 times the size of Callie's.
Then there's the Larry King horde. BRR...
Paranoia Fuel: Clark Dungaree is watching you. No matter where you are. And he's making a new hit show about it.
In "Pilot", a taxi driver of seemingly Jamaican decent complains to Mark about how his sister married a land whale. If we are to believe his sister is human, well... do with that what you will. Most of the series will probably embody this trope as well, as it comes from the same people who did Superjail.
The less mention of Twayne in a man-thong, the better. And those barbell nipple-rings. Ugh.
To some, that may be Fanservice, he is fit at least
Mark getting turned into a hot woman? Kinky. Having said hot woman's body go into a cursed rapid aging? Bad. Having to stop the curse by having sex with a man? Back to kinky... maybe. But having to have sex with the geriatric-fetish coworker? SQUICK.
This has been all-but confirmed in "Wet Hot Demonic Summer" (if not Butt Monkey status). Even after making their escape (led by a panicked Doug who was digging out to avoid being eaten), Randall still wants to eat him... with everyone else just silently approving.
He gets even more Woobie points when its revealed that he's an ex-assassin trying to find a new life in America. He also lives in a pet shop.