So.
I use Spotify Premium. It's a phenomenal way to get my head in the game for... well, just about everything.
I playlist everything. Thoughts, feelings, notions, themes. I make playlists like other people take selfies. Music is just one of the biggest and most important ways I process the world and my relative position therein. I've tried Google Play Music -- it was good, but had a less favorable selection to my interests -- and Apple Music, which could have replaced Spotify for me but fell flat on app and playlist organization. And there was also that bit where Apple doubled back at the eleventh hour on their initial promise that paid subscribers would get access to the full iTunes content collection, instead trimming it back to somewhere between a half and two thirds of the content (to encourage people to still pay $0.99 a song, presumably, which is massively overpriced) just before they opened the service. That part burned the hottest. So, I stuck with Spotify, although this is definitely a duel of equals. Each service is just as strong as the others (screw Pandora though. I offered money and they still wouldn't let me pick which songs played and when. Bad form, ya big palooka).
Anyway, I think it would be kind of awesome if we compiled a list of what services we use and who's on what and where, and that could make sharing stuff like playlists even easier. Bonus points as Spotify and Apple both have a semi-social media aspect to their services (and Google just wants you to use Google+, but that's another thread entirely) which could be cool for sharing music with each other in real time.
If anyone's down for that, pop some links in some comments!