hello honey<3 buckle in because this is probably gonna be a long one lol.

well. honestly. i don't think i have a lot of pet peeves when it comes to the formatting of a fic. i've seen people who are irked by using all lowercase for example, or justifying or not justifying the text, or using '~' in dialogue. but i think i'm mostly fine with all of that. i have my preferences of course, but i don't think any of this makes me pause or stop reading a fic for example.

my pet peeves are mostly about the writing itself. and those are (as are all pet peeves) entirely personal and me saying i don't particularly enjoy them doesn't mean anyone who writes them is at fault of course (with a few exceptions lol) but you asked my opinion so here goes~
(keeping this about minsung fics because it's what i mostly read)
my biggest pet peeves is when someone writes minsung as tools rather than characters. it makes them seem very one dimensional and far from their real selves.
i think it's in part because i don't usually read a lot of pwps, but my pet peeve is when their personalities outside of the bedroom seems to be nothing but an extension of their sexual roles. and this is not about their roles in the bedroom at all. i've read and enjoyed all sorts of different dynamics for them. i just don't like it when it seems like they think with their dicks throughout the day lol. like when jisung is painted as a brainless incompetent constantly anxious baby who just wants to be fucked. or when minho is written as a sadist (rather than tsundere which some people seem to miss that it's about not being good at showing the immense amount of care and love you have and hiding it behind a nonchalant front). i'm also not the biggest fan of either of them being painted as (previously thought they were straight until they realised they wanted the other) or when they are written as if they do not love the other (equally or at all) because seriously...have you SEEN how down bad they both are? unreal levels honestly...
and yeah. also just any exaggeration or overly stereotypical characterization of a certain trait and making it their whole personality (loser/nerdy/cocky/pretty/anxious...)
it's not that i'm against any of these tropes per se (again, with exceptions) but it just irks me when it is made to be the one and only character trait, especially when the aim is a full fledged story and not just a ficlet or pwp. i wouldn't feel intrigued to read through a longer fic if the characters don't seem like people but rather a tool to get themselves or the other dicked down lol, that's my main thing i guess
(i did not mention AUs or tropes or specific tags that I outright avoid because this is a different thing.) and yeah this might've been not what you were expecting but i hope you enjoyed this longish answer<3