Definitely the
60's for me - I was 20 in 1969 but an early starter and growing up in Souf London : soul music, bluebeat, Mods, the Who, the Stones... In fact I was in school with David Bowie (but not in the same year) and Peter Frampton.
On the beaches in the early 60's with the Mods, going to Stones' concerts in 1965 ...
I could write a whole list of the groups I saw live during the 60's and early 70's, the big and small free festivals (I can proudly say that I was at the first Glastonbury festival (actually strictly speaking the second really as the first doesn't really count)), hanging out in the clubs, in Soho...
Lots of drugs, the International Times, Oz, the Whole Earth Catalog.
I know this sounds like clichés but things
were great then - people were much happier then than now, more carefree, more idealistic, more fraternal ... but it was all over by the middle 70's : hard drugs (the Devil's Spawn), hate, greed and glamour.