Porn contains: doggystyle, doggystyle pov, amateur pov, fit girl, perfect body, cum on ass, amateur cumshot, big cock, close up pussy, big dick tight pussy, wet pussy.
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.