Generally I prefer video, but a well shot still or group of stills that tell a story are also very exciting.
I love sex with big guys making love to slim, strong, flexible, muscly-ab‘d girls, in particular anal sex, also deepthroat. Angel Emily, for example. This then taken on to extreme toy play like hkj, Siswet and so on.
I like some bdsm, more for the stretching, contortion, flexing. Bikini/fitness models yes, but less so the super big cross-fit build. I love and respect the athleticism, but just don’t find it erotic.
I like the same with gay and transsexual sex too. Big penetrations, limits approached and overcome. And preferably nice abs and or a strong back. Pegging and dildo play are fun as they remind be of what I can do by myself at home.
I’d much rather see a 7” dick deepthroat success after a little effort than the same poor girl struggle with the tip of a 12”. She might as well be licking a fire extinguisher.
I think the key for erotica for me is when testing and overcoming the body‘s limits to enjoy sex with strength and flexibility on show. This what excites me.