I switched from Pandora to Spotify a couple months back because my daughter wanted Spotify and they have a family plan, and I didn't want to pay for both services. I really, really miss Pandora, to the point I may pay for it separately (and I don't listen all that often), specifically because I love how their radio station type format works. If they had their "play this exact song I want" offering working before Spotify entrenched itself, I can't imagine why anyone would choose Spotify over it.

I'll probably spend a bit more time trying to get Spotify to work as I want, but in general it's resulted in me just listening to less music. I guess that's good for Spotify, since they're still getting paid (but not if it makes be question why I'm still paying them).