Defining rock is always quite hard, but interesting nonetheless. Classic rock is my favorite genre, but I also appreciate rock in the roll, pop, hard, prog, indie, and alternative variety.

Are we so sure that classic rock isn't 80s too? It's definitely not 90s, but rock in the 80s sounds a lot like in the 70s but just a little less raw. The classic rock stations I listen to play a good deal of 80s stuff. Perhaps the perception of it depends on when you were born.

Or maybe we're getting a little too stringent with these genre definitions? Isn't Pink Floyd progressive rock anyway?

Love all their stuff by the way, but there's a reason why Dark Side of the Moon, Wish You Were Here, and The Wall (and to a lesser extent Animals) are their classics - it's because those are the best.

Best Beatles album is Revolver, by the way.