Porn contains: point of view, facial, pretty face, petite teen, ball sucking, nice tits, cock sucking, dick sucking, orgasm, sperm, jizz, cum swallow, cum eating, 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.