lol, mine are going to be:

Pictures: (including Matt, Dom, Chris, lolz, Gifs, art folders)

Videos: ONE GIGANTIC FOLDER WHEE!!!! (maybe later I'll divide into gigs by year and interviews or something)

Music: albums, and then everything else... sheet music/cyber muse and the like I'm keeping on my computer for easy access.

But right now the hardest is just to FIND everything.