Ok I've had some time to think and I've got a few more kinks that I'd like to ask about.
Just like before, don't be afraid to give short and sweet replies since this will be another list.
1:Player Anal
To be more specific I'm talking about scenes where the mc is penetrated anally. It could be a dick, a dildo, a strap-on, a finger or even a long tongue. If it's something you are open to I think it would be a good one to add a fetish and fetish XP for.
2: Tentacles
I feel like this one is pretty fair game since this IS hentai after all. It would be pretty great to have the mc feed a long hollow tentacle, and having him get penetrated too would be even better. Of course a more classic scene of the mc simply witnessing a lady get fucked by tentacles would also be wonderful.
3: Animal Genitalia
This is another super niche one. Specifically, this would be mare pussy or canine pussy for future female furries, and potentially cloacas on scalies/avians. For futas/male furries maybe knotted, equine or tapered/prehensile cocks. Also genital slits for futa/male scalies/avians or fish. This one really comes down to what you're personally comfortable with, and it may be pretty divisive to include.