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.
YMMV: Tales of MU
Archive Binge/Archive Panic — Mack's first year at MU ends with ch. 496; the second year is up to ch. 151. Also: 117 chapters in Jamie's Tale, 12 chapters of As The Underworld Turns, and 77 chapters of Other Tales (assorted side stories).
Embries. He's there for a very specific reason: to keep order. This does not make him a particularly nice or good person, and he recognizes that.
Dell Mc Avoy from Law comes across this way too, for basically the same reasons.
True Neutral: Callahan. She shows some Lawful tendencies at times, particularly in her official capacity as a professor, but that's balanced out by... well... everything else she does.
Chaotic Neutral: Puddy. She's probably the character who comes closest to explicitly stating that they have a specific alignment. All she wants to do is whatever she wants to do, and she will twist any rule and abuse any loophole in order to get her way. She also has a disturbing amount of practical knowledge about blackmail, picking locks, hiding or disposing of evidence, etc...
Lawful Evil: Mercy. A truly chilling villain, especially since she is meticulously careful to do all of her horrible deeds completely within the boundaries of the law.
Fan Nickname — "Mack Daddy", for Mack's absent demon father (he's never given a proper name, though in the chapters where he eventually appeared, Mackenzie's mum and the character tags referred to him as "The Man")
Despite Puddy several times approaching Moral Event Horizon moments, and being a generally vile person, she has an extremely loyal fan-following on the forums, even in the face of hostility to and attacks on other fan favorites.
Strangled by the Red String — A very odd version of it, in that Mack is not going to be allowed to be straight, or celibate, or monogamous by turns. Not only does the story conspire to get her into sexual situations, Amaranth even ordered her to perform a specific sex act with Ian on demand, at any time he wanted, after Mack admitted wanting to do so. Ian balked. He got over it.
Apparently, the proper reaction to being horribly abused and turned into an unstable, emotionally extremely fragile and insanely self-loathing wreck is to fetishize the abuse - throwing about every single element of Safe, Sane and Consensual to the wind along the way.
Mack's aversion to ever having children seems to imply that if you have "bad" genes, it's a moral imperative not to have children and pass them on.
Use of the Fantasy Counterpart Culture trope often invokes quite a few [at best] uncomfortable stereotypes, and this series is no exception.
Mack thinks that she has bad blood. She thinks she's evil, remember? Were she to have kids, they would inherit her evil blood. Ergo, her aversion to kids is merely an extension of her own self-loathing, which has in-universe Unfortunate Implications.