I wish I was offered the choice in the preferences a setup where there was a build your own structure with tags, in the same way as Monkeymedia allows me to organise my music e.g.
<location>\<genre>\<author>\<title>\<filename> - there would be only a small number of tags suitable.
I presume the database could easily hold the string for each file designating its place on the disk. My structure of choice would then be would be
......<genre>\<author>\<filename>
etc