This looks fun to chat about!
Here are a few I have quite a bit of an issue finding partners for:
1. Adultery - Keep in mind, I do enjoy playing in a lot of group settings (more than 2 people involved), so I'm not terribly surprised at this one. I know people are wary about offending others and that's completely understandable. I don't blame anyone for being respectful of another partners feelings. This however, to me, is a major kink, I love it, the characters sneaking around, the betrayal, the emotional upheaval that both keeping a lascivious secret and losing one can cause. For me, I'm perfectly happy both ways, for it to be hidden completely or for it to be something eventually brought into the light. I'm a player that values consequences after all, especially as someone that often steps into the role of a less than morally respectable character. For me, I like to be in the role of the other party, the temptation, the home wrecker, be it as playing a female character or a male. So many interesting situations this one can lead to, danger of pregnancy, a fall from status/grace, even murder and mayhem. It's especially fun to me in the case of aristocratic types of family.
2. A Serious Incest Story - I like any type really, though twins are a special favorite and I've always wanted to try a mother/daughter story. Again, I like playing this type of thing in a group setting, so no horrid surprise here either that it's tough to snap someone up to do. Usually, when I start a pair with someone like this, they end up just kind of running off into the wind after a while, or getting embarrassed when someone else's character inevitably finds out. I do enjoy drama in my IC worlds, so it's always a possibility dirty secrets can escape into public. I heavily like the type of pair that know they have to keep it to themselves, but have a hard time with that when it comes to jealousy or just flat out being unable to keep their hands off each other. Really I've had so many ideas for story on this kink that just fell apart into dust when someone disappeared. Seems like everyone is interested till they realize how it'll affect their character in the eyes of others.
3. A Partner in Devilry - It's probably an odd choice to put here, but I have no luck finding people to pair my characters with that will match their wickedness, I know how bad my own can be and often times they revel in it so one will see it eventually. I want a look up close at how bad someone else can be, the depths of another's dark side. I want to see the ruthless play off my ruthless, the viciousness between two psychopath's with a twisted connection feeding into each other. Granted, I don't mind having my character corrupt another into it, oh that's one of my favorites too, but most often I find people who don't wanna play the bad because they are too sensitive, and that's alright, no criticism from me, but I want to find someone that can do it, be mean to other characters as a partner of my own. For a good example, if I'm playing one half of a demonic duo of succubi, I'd love to see the other side playing evil as well instead of just the half-way mark where no one can truly judge them because they never truly do anything besides stay in the grey area.
4. A Yandere - I have never met someone that can play this convincingly or effectively and believe me I've tried looking. I want my character to be the object of that obsession, especially in a group rp setting. Finding someone who can be cruel, who would kill, who would sabotage others for the sake of some deliciously depraved hang up on one person is definitely one of my kinds of psychologically fucked. Now, believe me, my characters are not submissive, in the slightest, so they can't simply be controlled, in fact they'd probably use the yandere as a weapon. There is plenty to play with here, lots of possibilities and much like incest, what I wrote above, I always have a lot of ideas for it, however, most people just don't want to have their characters be vicious enough it seems, or they run off after a while which is a bit disheartening admittedly.
5. Gore/Death/Obscenity - I like gory stories. I like horror stories. I like smut. I enjoy heavy description. If my character is torturing someone, it's going to be torture. If my character is ripping someone apart, well you get the point, I'll spare the details but suitably graphic. This goes for sexual situations as well, I like all the details. I have zero issue with it being poetic, in fact I rather enjoy that, clever speaking, though I also enjoy outright raunchy too. This is more of a "What I would like to meet," in the /way/ someone writes. I also very much like religious depravity, which oddly enough is something I also have a good hard time finding people to play seriously. Most shots at it turn into one, two or three scenes after which someone kind of just kerplops away. Death is another matter, I'm not really talking about something that has to be permanent, however definitely something with consequences. There are a lot of ways to bring a character back, cybernetically reanimated corpse for one, or necromancy, or vampirism, etc. I guess you could say the "Death," aspect for me, is more about creating a perversion and watching it cause havoc both in its own new life and others. Death is still a part of that I suppose, they have to die first. I don't find many who are willing to kill their character and have it raised as a flesh eating ghoul type for example.
6. Bloodplay - I put this in a whole separate category from gore because I feel it's much more artistic. Bloodplay to me is less ham fisted than gore. It's more ritual than simple evisceration, don't get me wrong, gore is on my list too, but I adore blood play for the intricacies, like Bathory immersing in the vital fluids of her maids to keep young, or a sorceress carving runes into another persons flesh with finely sharp knives. Yes, there's also drinking of it, I'm very much an old school VtM fan after all. There's a ton of symbolism that can be played with involving this and I so rarely get to write a good scene involving it as a good many of the people I meet just don't seem to want to dip into that type of area. Again, no judgement, people like what they like, but I most certainly would love to find those willing to engage in this sort of scene.
Bah, I've got about 10 or 15 more I could put on this list and it will get far too long if I do. Some of my kinks are fairly extreme, however, none of them are a real must to play with me. I can do more normal things too. Anyways, just a few I've had a good bit of trouble finding that I'd like to play with both in one on one and multi-person types of rp.