It's interesting that when people started addressing data storage they couldn't get away from the hierarchical and physical concepts of file cabinets, folders, and documents.
Generally speaking, when I'm looking for something, I want to search by metadata, date, a person, a sort of image, stuff I recorded in some timeframe, a color, a word sequence, type of music, artist, name of song, album...
I want to be able to create tags of my own and search for them. Systems can and do create their own, which is fine, but I'm fucking fed up with trying to remember what's on what disk and/or in what folder.[/rant]