Pop = You can pop, lock, and drop to it. Record companies need to shut it with ‘popular’.
Rock = You can rock out to it and have fun with it. You can be a rebel and all that jazz.
Alt = Strong lyrics and a different sound. Something original, but at the same time…not.
I guess that’s the simple way to put it. When I think of Pop, I think of like Britney Spears or something. When I think of Rock I think of Foo Fighters and Silverstein. When I think of Alternative, I think of The Smashing Pumpkins and The White Stripes.