I am a subscription fan.
I have never been one to spend money on owning music, although I love listening. I got my first CD player in like, 1992 or something so I didn't grow up on Napster/Limewire, although those were some interesting times with a lot of new discovery.
I listen to Spotify, for which I have the top tier account - no ads, and listen on mobiles and devices.
The caveat being I have a long train commute everyday, and subscribing was part of the deal in giving up cable, as in save a ton in giving up cable, but have access to Netflix, Hulu+, and Spotify.
I am currently trying out different methods of replicating the Sonos in house streaming (remote controlled device streaming spotify to speakers) but always running up against some hurdle.
Also - and I know I can conquer this with more mundane methods, but I love having mobile music for when my 3yo and I have time to kill.
I also really like Google Music but it was a little flaky for me when it first rolled out.
At $10/month I even think its worth it to have mobile (again, long commute) because I would spend at least that much on new music at the used CD shop every month and not have all the test driving opportunity.