About xbox...there are three things I don't like. First, unless I am doing something wrong, it attempted to match my music in the cloud. I don't need that feature. I don't want cloud streamed music. Secondly, there were those ads - between songs. I don't mind ads showing in the app while the song is playing, but between songs is not cool - in my books. Don't get me wrong - I understand the needs for adverts etc. just not that way. And, third, I am not into that subscription model for music. All I want is a music playing app...no suggestions to listen to Rihanna or whoever, if you know what I mean!
Btw, I also could not get comfortable with Nokia Music. In this regard, Android is cool - I have DoubleTwist on my phone, which is excellent (even the free version).