Porn contains: kink, big cock, dirty talk, footjob, missionary, rubbing, cum inside, point of view, perfect pussy, 18 year old, foot fetish, stepsister.
Porn contains: big cock, point of view, deepthroat, amateur blowjob, edging, slow teasing blowjob, huge cock, big booty, natural tits, petite, cum in mouth.
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.