I'd have to say I am mirror something of the stat heavy site sentiments. Like I already deal with a job that is heavy in numbers (accounting) and I already love my D&D. I do not need that again on a site.

Otherwise, I'm usually pretty open to most things.

i am not really interested in real life RP with no twists.

Missions in roleplays.

While I think they are great if they make sense to your character but having every Joe blow that joins the site doing the same gathering herbs mission is so lame. There has to be better ways to showcase experience and growth. I know this is mainly towards stat base RPs but that's my two cents. 

Thinking more, I can add "real life RP" and "smut" to the list too.

I'm kind of lukewarm about whether or not I dislike Slice of Life in general. Hmmm. I'd need to actually do it more to figure out how I truly feel.

I also don't like to play someone else's characters -- fandom canons, for example, or very precise/strict wanteds. I'm not very confident in my ability to portray someone else's vision.

do "smooth sailing narratives" count? LOL

i guess another way to refer to it is "easy Ws" but that doesn't sound 100% correct to me. idk, ask anyone who's plotted with me and you'll likely be told i like conflict a lot. far too much, even. it's definitely personal taste, but i vastly enjoy writing and doing plots that demand characters (especially, and more accurately, my own) lose, fail, screw up, get hurt, hurt someone else, suffer a major loss, and have to demand their way into better shores. i'm a sucker for a good payoff, and i'm way too in love with writing and deconstructing tragedies.

also +'ing "threads with no specific direction" / "aren't About anything". its for that reason that i struggle a lot with SoL or chill threads in general tbh.

I think in all my years of RPing, I've never RP'ed my characters ever being a victim. Now, they're not invincible or always successful - far from it. They're definitely capable of running into defeats and failures and generally things not going right for them. Or basically, they may have moments of weakness or vulnerability - but they're never completely helpless or powerless.

tbh i really had to sit here and think about this question 'cause i never really paid any mind to anything i don't like. BUT if i had to choose...

idk if this makes any sense, but roleplays/threads where i'm taking the full lead/the other person is taking the full lead and there's no form of feedback. ideally in a collaborative hobby, i'd want my writing partner(s) and i to sketch out how we want our characters to go, the adventures they take, any conflict, etc. i don't think it'd be as fun if one person's doing all the creative control instead of it being 50/50. imo it's even worse when you HAVE to go along with it without any sort of objections.

I had an RP partner that did not take control at all. In our first thread, I was honestly quite annoyed. I don't really remember much if I talked to them about it but I'm sure I must have asked them what they wanted. They're kind of cool with whatever. I guess I got used to it though because either way, they're really fun to RP with and we spent a lot of threads and plots together. I'm thankfully very good with random plots but if anyone's struggling, definitely communicate :)) I guess we were a good match since we played our strengths and covered what the other didn't like.

That was just specifically them. I haven't really experienced that with someone else so I don't know how I would have felt in the long run.

Riffing off of what other people have said:

I don't like slice of life/real world stories. Not in tv, not in books, and not in my own writing. There has to be some kind of supernatural element present, or barring that, something highly unusual about the world setting (like a crime series where the characters inexplicably run into a new criminal organization every week) or I am bored to tears.

I don't like endgame shipping plots where the characters are already pre-determined to be together before they're even made.

I don't like stat heavy systems where I have to do a lot of math, or PvP unless the outcome has already been pre-determined in ooc discussions. (This is not restricted to just combat; a situation where manipulative character A is trying to argue that suspicious character B should trust them, for instance, is also something I would classify as a PvP scene.) This doesn't mean that every beat of the scene has to be plotted out beforehand, but I should at least know what outcome I can expect to work towards; otherwise, it feels too much like trying to "beat" the other player, and if I wanted that kind of competitive environment I'd go play a real video game with real rules instead of writing on a forum.

On that note, I don't like playing as innocent, sweet, cheerful characters whose pain is largely caused by the world being cruel to them instead of something they did to themselves. The reactions I live for getting are "I feel bad for them but my god their interior life is messed up."