Re: No Correlation, I think!
@sachinee- I'm sure we're fairly close to that. I remember a now defunct music service called Rhapsody that I really enjoyed because it allowed me to rate music from 1 to 100 and it would weight how often songds were played by the scores (1 to 5 stars isn't enough for me), and once you got that thing dialed in, I swear it could read your mind on what you wanted to hear.
I think the real thing holding that back is royalty rates. If you use a streaming service like Pandora or Spotify, I'm pretty sure their shuffle is based partially on the rates they pay various artists. I see thumped up songs get played constantly while others rarely come up.
If mood rather than money dictated the songs, these companies might have to change their business model.