The purpose would be for the users to generate AMV lists that can't be derived from a database search. For example, a list of AMVs that use music from the Eighties or a list of AMVs that use the piano key effect.
Other examples:
Good
- AMVs that have French lyrics
AMVs that use tv commercial music
AMVs that use country (or electronic, etc.) music
- AMVs with music by Linkin Park (already available by searching)
AMVs that use instrumental music (this might be too broad a category)
AMVs with songs sung by Fish (this might be too narrow a category)