Porn contains: petite brunette, orgasm, college slut, cowgirl riding, riding orgasm, hard and rough sex, hot brunette, real orgasm, girlfriend, schoolgirl.
Porn contains: amateur threesome, surprise threesome, pov fuck, big natural tits, ffm threesome, redhead milf, cum in pussy, point of view, missionary creampie, missionary pov.
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.