most of the time beatboxers do classify their sounds in relation to drum sets. make's it easier when talking to each other. some sounds are multi pirpose though. with a little tweaking a snare can be turned into a clap for instance. i've only recently started doing vocal scratches though. when i first started practicing em apparently i sounded like i was killing a cat. i'm better now though. almost sounds immpressive. as for using em as a beat, it more fun to do it that way. it's a complete home made package that way. u can get every sound they way u want it as long as u can do it, and with multi layering, u can get a serioulsy good beat. a man called killa kela did that on his album, and it's just as good as any produciton job. he's as good as rahzel though, so it's bound to sound realistic.
one thing i like doing is dnb neats. great fun to drop a well fast beat.