I have voted for the 10s because it started to get interesting again. The money was falling out of music rapidly and the times were harsh. For people like me, the decade felt similar to post-punk. Solo artists became more common that bands because bands are too expensive and you can be the band yourself anyway. Bandcamp has become the hub with bands now sustaining themselves through direct sales and direct connections to their fans: subscriptions and Patreon keep people ticking over. There's no scenes, phases or fads any more; the internet has made the turnaround of anything incredibly fast.
Out in the mainstream, the struggle was real. Bands could only earn a decent crust by touring due to the devaluation of recorded music and thus, ticket prices skyrocketed, creating a weird micro-economy where £80 for an evening's entertainment became reasonable. The 10s is where artists regained control of themselves; many followed Radiohead's example and self-released albums in the first instance - in the ensuing years since "In Rainbows", the time from announcement to availability of an album has, in many cases, shrunk to nothing at all. Whilst Radiohead did it because they didn't have a label and didn't want the album leaked, in the hands of the bigger industry, it became the ultimate tactic for instant fan engagement, taken to its inevitable conclusion when Beyonce released not just an album but videos for every track on that album with no notice at all. Whilst the trend began in the 00s, it was in the '10s that music went from being "released" to being "dropped". Now a release strategy is as important as the release.
There are no more trends, no more eras - culture is too disparate. But, in turn, we have access to the music of more people and a greater diversity of voices than ever. That's the joy of the 10s as a decade, the breadth, the depth...things that would have existed on 500 7" singles in one state of the US is now up there for everyone. There's gold in them thar hills, just grab a decent sifter and come join us.