I'm of the same era, Desso, I think, but a few years behind you. I was only briefly into straight classic rock (e.g., Aerosmith, Foghat, Led Zeppelin), but then I moved into the progressive rock scene -- stuff like Genesis, Jethro Tull, and Yes. After that, I moved into punk rock and then new age.
I can't listen to the classic hard rock, punk, or new age stuff anymore -- not for more than a song, anyway. I just don't have the taste for it anymore. I still listen to some of the progressive stuff, though, now and then. I've been listening to Genesis' Trick of the Tail lately. Some of that stuff holds up really well, at least to my ears.