Hmmm, I want to say 70s, as it was fairly diverse, and there were many many great artists producing their best work. Rock, Soul, Funk, Punk, Folk, Reggae, Disco, etc produced some amazing music during the 70s, so I'd probably give it the edge. On a selfish note, I'd for 80s as that's when a lot of my favourite bands became active. Alt Rock, Punk, New Wave, Hardcore, Indie, Hip Hop & Dance music all flourished in the 80s. As others have said though, It's hard to pin down music to a decade. Good music goes beyond time.