What about the Rolling Stones? They've been around forever. And Aerosmith lost it after they got clean and off drugs. The Scorpions, Van Halen, and Ozzy have been around a long time too.
I've listened to AC/DC my whole life. My mother loves them and of course my musical roots started with what she listened to, can never say they were my favorite. Recently(don't know why I haven't noticed this before) I've realized that all their songs they chant the title of the song over and over. Realizing this I don't have as much appreciation for them anymore. And their new album, "Black Ice" was the worst I've heard yet.
But for all of you AC/DC fans I suggest checking out Airborne if you haven't heard them yet. Sound as if they are AC/DC themselves.