As a rule of thumb, pretty much everything directors, camera men, and post-production editors do is bad IMO. Not intentionally, but they are constantly interfering with what could be hot sex. The evolution of porn is proof of this.
I remember a hot scene of Vanessa Blue and I think Marco Banderos, where it was just a camera on a tripod in full view of a non squeeky well lit bed with nobody else in the room. That was the hottest scene I've ever seen Vanessa Blue perform, and I've seen a few. No cuts, no direction, no script, no close-ups, no camera movement, just two good looking people who knew how to have hot sex on camera.
Would love to see a site that throws two hot pornstars together, and the director just says fuck each other the way you want to fuck, and promptly fucks off himself. Maybe have two fixed full shot cameras at 90 degrees, as long as post production doesn't cut between them for at least a minute.
Full picture, no distractions, hot sex, would be good enough. But nowadays I think the performers would need to be explicitly instructed not to follow any routine, and not pose for the camera. Do whatever positions you want, for as long as you want. That would add to the reality and unpredictability of the scene, and make consumers come back for more.