Okay, I need some help. I need to get ideas for a classification paper for my english class. I am thinking about breaking down Rock music.

Heres the deal: I need 3 or more sub groups (I don't want much more than three beacuse thats a lot of work.)
I need to give a name to each subgroup that cannot give us the common type.
Ex: instead of metal (music) Blistering guitar solo-drum beating-pumping bass- screeching vocal madness

I don't plan on doing metal, just because I don't know a huge amount about it, and I don't listen to tons of it.
top axes:
Taylor GS8
Fender American Strat (w/DiMarzio pickups)
Epiphone Les Paul
do punk, easy enough to explain, A E D now start a band! P.M. me if you need some more info on it, that or some classic rock like Zepplin or Pink Floyd, or maybe even Sabbath