Hmmm I got a few, to name a few,

Gameshow style tf, Ive done it a bit but I wanted to flesh out grant more with a big YCH style pic with like 4 characters, each of them in various stages of TF

Artstyle TF, Ive also done this one a bit but not to the full extent Id like, id love to do some more abstract UPA style stuff for example, have it be like a rapid fire changes by hitting a tv remote a bunch of times

Cock shrinking sounds fun, I for sure want to mess with that, especially if everything else grew along with it.

and uh, lastly I suppose hyper foreskin stuff, always seems fun but its weird, for me lots of my ideas are kinda flash in the pan, its easy for me to forget em unless I get the prompt in the moment, their often just triggered by whatever nearby or infront of me in the moment