This has probably been done plenty of times, but I'm gunna start my own party! With blackjack, and hookers!

What small thing that doesn't have a lot of tags really scratches that itch you have? Don't be shy, we're all depraved degenerates here.

Me? Love me some punk-themed gals like the bird there as my icon. Love a chick that looks like she can kick some ass and make some rough love.

Aphrodisiacs,Pheromones,Love Potions, etc. - Hard to find much good content.

memes, what, what_has_science_done, where_is_your_god_now, why and dragons_having_sex_with_cars.

cars_(disney) doesn't have a whole lot.

breast_rest
one_breast_out
breast_size_difference

D4rk said:
Aphrodisiacs,Pheromones,Love Potions, etc. - Hard to find much good content.

Man, the Salazzle influx must have been an absolute blast for you.

theultra said:
memes, what, what_has_science_done, where_is_your_god_now, why and dragons_having_sex_with_cars.

^Not enough horror porn, I mostly enjoy the content for the comments on it. Ghost Pup was some of my favorite.

niche tags that were mostly just tagged by me in their early history:
featureless_crotch
group_masturbation
resisting_orgasm

Other nice niche tags:
parallel_sex
public_use / in_wall
casual_nudity / casual_exposure
two-handed_masturbation / two-handed_handjob
comparing_penis
take_your_pick
clothed/nude
talking_to_viewer
unwanted_erection
hands-free -sex -masturbation -anal (yes that's more than one tag)
ball_sitting
crotch_sniffing
perineum
?/?
cum_through_clothing
bound_together
nutjob
cloacal_penetration
breeding_mount
Edit: barely_visible_genitalia

/thread
I'll be taking my depravity award now...

Not sure if this is considered niche but I really like partially_submerged. Leashed_viewer is another tag that I wish had more posts.

Of all of mine, wings is probably the most niche. That, and non-vore coiling.

I also enjoy the unusual_position tag a lot, though mostly for the humor value.

Non Hyper/ridicolous size breast expansion is kinda rare, too

D4rk said:
Non Hyper/ridicolous size breast expansion is kinda rare, too

breast_expansion -huge_breasts does seem to be full of oversized breasts anyways, so unless it's cleaned out it does seem like we're going to have difficulty finding them.

I enjoy the various nudity tags such as
nude_beach
public_nudity
tasteful_nudity
social_nudity
nudist
Although most of those are probably part of the casual_nudity tag which is fairly large and I doubt it counts as a niche tag.
Also sleeping_naked is not a tag, but if it was it'd be part of my list. Oh and my niche tag of niche tags is wet_dream it doesn't really go with the other tags on my list but damn.

bedroom_eyes chinese_dress drooling hair_over_eye half-closed_eyes predator/prey_relations tailjob

I really like hair_over_eye. It often looks sexier than being able to see the eyes through the hair, anime style.

leomole said:
breast_rest
one_breast_out
breast_size_difference

one breast out is nice :)

one-piece_swimsuit is my weakness! IDK why probably cause they're skin tight so it's kind of like a latex/skinsuit fetish I guess? Anyway though I love that tag and I also love whoever made the contraption_concept tag, I've been trying to help tag some neat fucking_machines and other BDSM and robotic contraptions under the contraption concept tag

I find standalone_testicles to be a fascinating concept, though nobody appears to be drawing it and I think I'm the only one tagging it.

• ~foreskin_play ~slit_play ~sheath_play (not helped by the lack of tag implications)
• snowballing always makes me smile
• male_pregnancy is another one of those weird fetishes I have that you don't see a lot of
• transfer_birthing is definitely undertagged
• Are portals considered niche?
• ~excessive_pussy_juice ~excessive_precum

Yeah, I think that covers most of the niche ones. I follow a bunch more tags, though, unlike the ones listed above, I expect them to have new stuff at least twice a week.

translucent_tentacles

I like to see every detail

covering_crotch is fantastic and I wish more people appreciated it.

Same with barely_visible_genitalia for the females, cause then you just get a gauge of how tight it is.

You don't see branding too often the closest you'll see is tattoos but then you don't get the ownership aspect with all of them.

penetrable_sex_toy combined with toying_parter like post #1418704 or post #773026 are very fun, it's not one tag but it's a specific fetish/scenario of mine

If I had to pick a few more I'd say
-portals (like what's in Fek's game "Rack")
-milking_table (similar to glory_hole but not quite)
-ruined_orgasm (changed to interrupted_orgasm)

bad_parenting is pretty great

Until I get time to go through them all, I've only got girly and ambiguous...

Quadruple_amputee

furgonomics

genderfluid

Covering_crotch and one_breast_out is nice. Other than that I can't really think of any other one. ass_up, but specificaly a front view where you see the character's face and and a nice ass behind them, its hot and really makes you want to see more since you dont see the characters genitals from the front.