Maybe some themes can help:

-Pirates find cursed treasure.
-A Tomb Raider/Indiana Jones knock-off that uncovers a transformative artifact.
-Post-Apocalypse raiders find an old vault full of mutagen.
-Rogue nanobots reshape the crew of a space-station.
-A genie or summoned demon fulfills desires in an... unconventional manner.

You know, stuff like that. Just something that (TF or Not) you can use as a framing device. Maybe look to some other writers to get inspiration.

I have been pondering the idea of someone in a wishing state idly wishing that they were kinkier. Normally they'd stick to the simple, basic wishes, but in their new state of mind they wish for strange, extravagant outcomes.

Yeah, there you go. Use these kinda stereotypical scenarios and put your own spin on them. That idea in particular is pretty interesting. Again, inspiration from others is always a good way to come up with things when you're stuck.

Glad I can help. I have some more specific ideas, if you want to hear them.

Sure go for it. More is always good.

-A couple that is constantly fighting decide to adopt a puppy to try and help them fix their relationship. It doesn't help, but during one of their arguments, the puppy accidentally makes a wish. The couple are transformed into the puppies parents, and they make up while tending to their new baby. (Either the couple becomes feral or all three of them become Anthro; couple genderswaps (MtF and FtM); type of dogs up to you).
-Several friends decide to check out the old, abandoned mansion on the edge of town. As night falls, they start to notice strange happenings, slowly transforming. At midnight, they meet up in the mansions ballroom, fully transforming as the manor comes alive into a bustling ball. They hook up with the guests (or each other) and dance the night away! (TF into Anthro mythical creatures (Kitsune, Dragon, Griffon, or Displacer Beast as examples); period shift from the modern era to the Roaring 20s).
-A Cultist attempts to free an ancient avatar of chaos, while a Paladin attempts to stop them. However, the cultist succeeds, and the ancient evil is freed, and... Is no longer evil. Apparently, being imprisoned in stone for 10,000 years gives plenty of time for introspection, and now the chaos spirit just wants to see the new world and have fun! Of course, the two don't let them leave, so the spirit just turns them into new travelling companions! (The Paladin gets fused with his horse and becomes a Centaur; what happens to the Cultist is up to you.)

Just a few ideas. Feel free to modify or change them as you see fit. Hope this helps!

Oh, forgot one:

-A company has bulldozed an old copse and begun constructing a building there. However, the Fey that lived there have waited, patiently, for the heads of the company to visit the site to get their revenge. They conduct a ritual, transforming the site back into a forest and the workers and executives into the lost creatures. (Mass TF of the staff into Genderswapped anthro or feral animals (Construction workers become squirrels, security guards become deer, and architects become wolves); executives transformed into trees.

I'm still around! Not doing so great but surviving so I'll spare the details. ^.^

Moods TF or otherwise? Uh, I guess it's kinda tame compared to what I'm usually into but I've been in a 'goth tf' mood. Kinda tying into that "Big Titty Goth GF" meme, if you know it? And I suppose it's halloween, so that might be connected.

And then this morning I woke up with a bizzarely specific desire for some meta 'character sheet editing' type TF, where it's like you're a living fictional character and when someone alters your character sheet or ref sheet or other official documentation, it changes you for real, maybe with you aware or not, maybe with retroactive history etc. I ended up doing a quick thing related to litrpg books where, in that world you're bound to game rules etc, what if something changes your class? Or everything else, like race, gender, name, etc... And the classic 'You're an NPC now, here's your backstory.'

Actually there's one thing I was doing that sorta ties them together? A goth TF where I got basically replaced with a different person with their own history, but still had my memories, and that was pretty fun because I started exploring their life and who I was then. Finding my new name on my ID, unfamiliar contacts on my phone, new family to go with the new name, I go outside with the friend who TFed me and my car is different, we go to a different apartment and look into my PC and check my emails to find out I have a better job, but I have no memories of this life I'm worried I won't be able to do that job and have to tell everyone I have amnesia... It was wild.

*hugs* Hope things get better on your end.

Altering particulars is good. Had a ponder of a clock that could be wound back, and each time you turn it you lose some years but get to specify one change that happens to you. Many possibilities, though the idea of "I want a twin sister" and splitting into two tickles my fancy.

Role adoption is neat, though it needs a good reason for why it's happening. "You will be the [Small] [Fluffy] [Nimbat] with [Telekinesis] powers." "Yes, that sounds like a good package."
Idle derp thought: getting a receipt for your TF, itemized like so.

Yeah, reasons can be important. Often for me, in one-off flings, it's as simple as throwing a card carrying villain in there to do things for basically no reason, but I'm sure you're actually trying to be a good writer. XD

One option is to have a planeswalker who needs to change contexts because the local physics aren't compatable, or in the case of our litrpg example, you don't have a 'character' in the 'database' and the options don't perfectly match your normal self, so you get a little TFed to fit in.

Idea wise for me theres not much, just stuff like ftm, the usual inanimate like adventuring gear tf or furniture tf, or even stuff like starting with no memories/a blank slate and making someone entirely new from there.

I've been poking at a Travel Lodge/Log Cabin sort of change, where people are invited to stay as long as they like(and changed into shapes that encourage them to stay a very long time indeed). Haven't done furniture yet. I do want to have someone resting on a rug that is bare in the middle, only to sink in and become the decoration that should be there.

If I may ask, what about FtM excites you? It's not my personal preference, but I do like to understand the mindset so I can write it better.

Ill admit, for the ftm its a bit hard to explain, probably just my orientation affecting it (gay grey ace) as well as the general rarity of it tf wise

Blah

Blah!

Hmm, lessee, some things that cross my mind:

* Have been reading a bunch of misc. nerdery and had this thought: it'd be fun to play off the idea of portraiture as true representation of the subject in a TF-ey context. A curious problem - the more the painter tries to capture the model, the more they resemble (...?)
* Seasonal story idea that I started and stalled on some years ago: a setting in which the standard "holy shit everyone turned into their costume!!!" thing is actually a totally normal part of Halloween. Normally, it wears off the day after...but sometimes it doesn't. (Attached protagonist concept: a character who avoids Halloween parties after they changed in a way they maybe didn't quite expect, long ago...but the forces of "the holiday spirit" have about had it with that.)
* TF as akin to joining or landing in a subculture: this thing that happened to you means you suddenly have things in common with a group you never really identified with before - how do you come to terms with that? Will you ever fit in, learn all the shibboleths, feel like you belong?
* Being a dullahan would be super comforting because you could just give yourself a hug whenever you needed it.

> Have been reading a bunch of misc. nerdery and had this thought: it'd be fun to play off the idea of portraiture as true representation of the subject in a TF-ey context.

(Strong correlation here with the folklore idea that mirrors display a changeling's true shape...)

"I'm still the thing" is a good mood, yes. "Who did I turn into last night?"

Ahaha yes XD

one that always just pops into my mind is image tf. either becoming the full image itself or just a small specific part, such as becoming a small bit of shine on an object in the pic, or just a few specific lines.