The idea is interesting but I always feel like sharing music like that doesn't work.

It's similar to the #music channels that communities sometimes have. People post their favorite songs, or new songs they just discovered, but as it's a diverse group of people posting them and not a tight-nit group that enjoys similiar music it just becomes a stream of new music and people have no idea if they might enjoy it.

It works between friends when people say "I know you like xyz, you might enjoy that", but outside of that the "sharing" part is more fun than actually trying to go through a list of new songs and picking what to listen.