While working hard on my phd just now I was looking through the mp3 collection at some unnamed company. This is the most convincing argument for proper meta-data I've seen in a while, we have some 20k tracks divided into folders, we have classics like:
- Metal
- Metall
- Pop
- Pop&Rock
- Rock
- unsorted
etc. all chaos, but the best is the sub-folder called "multimedia" offering the following classification:
- a-z
- albem (albums)
- deutsche (german)
- lustiges (funny)
- themes
where EVERY category can overlap. This is even better than the those animals that from a long way off look like flies.