'Til the beginning of the '80s, there was a number of pretty good big "dumb" rock bands like Thin Lizzy, KISS, Van Halen, etc....Fun bands. Then they either disappeared or started making crappy music. Came the hair metal bands on one side of the Atlantic and the NWOBHM on the other which was one of the worse moment in the history of rock'n roll (actually it didn't roll at all). Only band I still like from that period is Motorhead. The late 60s and early 70s were way above.