Best music service? Pandora, Soundcloud or Spotify?

Dunno, never used any of them cuz I use Last.fm.
In my opinion Soundcloud is kinda like Bandcamp & all that, used to upload & promote our own music though we can listen & fave other people's songs. Soundcloud is also useful for podcasts.
If you're looking for an app that's solely a listening station then pick either Pandora, Spotify or Last.fm. Soundcloud is more than that I guess *shrug*