I've got lots of fetishes... all of em are secret offline I guess, but I am not sure if there is anything so secret I wouldn't mention it online...
Gender bender (male to female) have been a big part of my sexual fantasies for as long as I can remember, and for a loooong time Transformation played a big part... Nowadays not so much... Its just... If I try to imagine my self in some sexual situation, I got to be a girl ... I simply can't put my self in the guys shoes... My brain just kind of freezes if I try... Whether you can call all that a fetish or not... I don't know...
But I have others... I've certainly got a thing for women in collars and in lots of other bondage, also latex outfits of various sorts, especially gloves, stockings, corsets and narrow/restrictive skirts... and high heels certainly... slimy tentacle fun works too... and blowjobs... and being dominated by women... and futa... and being "corrupted" into a completely shameless cum dump slave... etc...
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I got summoned as an Isekai Hero, and for one reason or another, I also turned into a super cute girl of my dreams, and kind of "OP" to boot... So... Nore of a Heroine... and I go on a quest to slay the evil demon king, and end up molested by various hentai monsters along the way, goblins, orcs, slimes, tentacles, etc... but ultimately overcoming each trial before moving on... until I finally reach the demon King... who turns out to be a super sexy Succubus... and I end up completely defeated... and disempowered... and the demon Queen then reveals that, they are infact a futa, and they are going to "train me"... After a time skip ... The demons have conquered the kingdom I was summoned to save, and the demon queen brings me out in front of the conquered people, to show everyone what kind of cum dump slut their so called savior truly is... and I am of course in a skimpy latex slave outfit, with a collar around my neck, and have "become" a completely shameless slut, who can't wait to get my lips around my beloved mistresses cock...
Something like that should be fairly ideal fetish scenario that tickles most of my fetishes I think...