Earlier quoted context omitted.
I gleefully deleted my music collection after being back in the USA and able to use Spotify. Having access to a astounding quantity of music without having to maintain a library is so, so freeing.
I'm strongly considering this. I've got about 30-40GB of music stored locally (relatively small, I know), and I'm not sure why anymore. I tend to prefer mainstream music, so it's easy to find this stuff, and I've not listened to anything local in many years. My biggest concern with deleting them would be forgetting about music that I previously liked. Seems like running `find` on my music directory would solve that.…
Unsure about Spotify - but Google Music allows you to upload your own collection as well.