Trigger Warning: I'm a freak among freaks. (What were you expecting with a name like "slitherhence"?)
Casual pissing (Perversion... not humiliation): woman pisses and doesn't even act like she notices it. Incontinence without the shame aspect. Bonus: She wants to be seen pissing and takes pleasure in how perverse such an act is, made more perverse by how casual she is about it.
Pussy Tentacles (Perversion): woman has one or more long, prehensile tentacles safely hidden away inside her womb, with no outward evidence. Can use them to secretly fuck herself or to fuck other women. Bonus: tentacles aren't under her conscious control and randomly molest her and any pussies or cocks that get too close to her slit.
Transformation (Perversion... not furry): I realize there are games _labeled_ transformation games. But very very few of them actually are. CoC, TiTs, CoC2, Lilith's Throne, and Flexible Survival are the only games that come to mind. And four of those three are almost entirely furry focused. Most games tagged "transformation" have exactly one transformation that is mostly glossed over at the very beginning: male to female. The rest of the game typically focuses on either gender dysphoria or corruption. These are not really TF games... have the character start out female and be transgender and you get the exact same game. What I want is transformation games where you grow nipple cunts and tongue cocks and twats that drool constantly and squirt at the slightest provocation.
Pointless Clothing (Perversion): Clothing that does not cover the naughty bits. String-only microkinis. Mesh/net body stockings. Thigh-high sweater socks and a sweater cut so it only covers the shoulders and arms. Crotchless and breastless/nipless armor. Yeah, it exists (girl life, for example), but it's still pretty rare and is usually glossed over.
Living armor/clothing (Perversion... not BDSM): It's been done, but it's super rare. Armor that molests it's wearer is mega hot. Marvel's symbiotes on a female makes for some interesting ideas. And the symbiote has the perfect hiding place too. Bonus: paired with mental corruption and pervese physical transformations... I would be in danger of fapping to death.
Lewd Parasites (Preversion... not BDSM): Again, it's been done... but it's very rare. And most of the games that do it are really mind control games (BDSM). I want one where the infested woman is in control and loves it.
Father-daughter Incest (Romance & Taboo): Dating my Daughter is just about the only game to ever attempt this afaik. And F is still a douche. I thought Lewd Island was going this route but then it suddenly turned into a bog-standard mind-control and rape game.
Free Use (Perversion): The promise of A Town Uncovered... but actually delivered. A game where either the character gains access to a free use society full of slutty, exhibitionistic perverts or works to create his/her own.
Body Piercing (Perversion): This one is actually common... but scenes, without fail, gloss over the piercings rather than make them a part of the fun.
The good news is that I plan to make a game that has most of these in it. But that's down the road a bit.