Porn contains: amateur couple, rough anal fuck, anal creampie, amateur anal, first time anal, hardcore fuck, hardcore anal, tied up, ass to mouth, ass to 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.