It's sometimes hard to gauge what an audience wants at any given time.
The unfortunate side to YCHs is that sometimes its a hit, and sometimes its a miss, and you can't quite tell.

I've normally had good fortune with BDSM pinup type of stuff. Or just pinups in general.
Stuff that shows off a character in an alluring pose seems to at least gaurantee me a good price.
Otherwise, YCHs that are themed around holidays. (i.e tentacles or magic for halloween)
But those are only two suggestions that I have from my own personal experience!

I'd personally love to see what you come up with!
But this time of year is usually recoup period financially speaking.

thank you <3 I will consider it uwu