Porn contains: slow blowjob, sensual blowjob, teasing, oral, big booty, cum in mouth, huge cock, deepthroat, cock sucking, hard and rough sex, natural tits, sucking.
Porn contains: hard and rough sex, point of view, teen threesome, extreme deepthroat, sloppy deepthroat, multiple cumshots, orgy, face fuck, throat fuck, amateur threesome.
Porn contains: ass fuck, hard and rough sex, big cock, deepthroat, face fuck, sloppy, anal fisting, anal gape, gaping asshole, facial, cum eating, big butt, oiled ass.
Porn contains: riding, point of view, cock sucking, cum in mouth, cum play, high heels, lingerie, eye contact, oral creampie, deepthroat, sloppy, sucking.
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.