Porn contains: cowgirl, reverse cowgirl, riding dick, squat ride, big booty, big butt latina, big boobs, real couple, thick white girl, big cock, passionate sex, loud moaning, riding compilation, ass worship.
Porn contains: reverse cowgirl, bubble butt, fat ass, cowgirl, big butt, pawg, shaved pussy, riding, beach, doggystyle, dripping creampie, cum inside, cum in pussy, bikini.
I'm sure it's better to search for porn with tags rather than categories. Usually authors specify a few general categories and lots and lots of qualifying tags. Here's a list of the most popular amateur porn tags. Not enough? Below is a link to all the tags used on Hobby.porn.