This is a very simple suggestion, and it's basically just: Make an option in the Account Settings that dictates where the Music Player shows up. I haven't really done anything with the music player because it's on the right side, where... almost all the important things to interact with also go. It gets in the way, and it also just irritates me having it over there (I can't explain that part).
I think it'd be nice if it could attach to the top left, top right, and also bottom left, in addition to its current place in the bottom right. And I don't think it would be very hard to program. If I can only have one, please make it so it can be on the bottom left, too. Left or right. It'd be easy and simple and I think a lot of other people would appreciate it, too.