I still find lots of new music everyday, but easily the best was the 60s. because the 60s took rock & pop from its basic and really expanded it and showed all the possibilities, that there were no rules. by the time psych broke into prog and glam, after that, music just seemed to recycle things in new ways.
punk was like early 50s rock, break rock down to its most basic and dangerous.
80s mtv pop was like 60s bubblegum
hair metal was glam recycled
grunge was basically punk recycled
garage rock basically punk.
nowadays, bands that matter take pieces of what came before and make it their own. but in the 60s, when those boundaries were being pushed on a daily basis, with the pop machine meaning new stuff cranked out faster and faster, really pretty amazing.