I have a librarian friend who sorts em by the year they were composed. (Helpful if you're a big classical music fan, I guess). Books he sorts by the Dewey Decimal System. (Yes, at home.)
I'm not sure the extra elements in this add anything. It would have been more dramatic to me if the CD case filled the frame so that my attention wasn't grabbed by everything else.
Yes - fits the topic excellently. Does need something to make it jump out though, a flat on and simply lit image could be made better by using some angled light and a different viewpoint, something to relieve the monotony of the cd covers. Yes I saw the Pink Panther and whatever the other toy is, but it needs something more.
Hope that helps a little