Okay, I'm making a little bit light of what can be a debilitating condition so please don't be offended, but, how do you sort, assuming you have a collection, your CDs, DVDs, video games etc? My books are by author and series where appropriate. My CDs are sorted by artist. My DVDs by genre (it was by director for a while but it got too messy). My video games by system, genre then series. Oh, and photographs by camera used and date (I don't really tag by subject that much unless they're keepers). Does anyone else do this or am I alone in finding the need to fix the disorder when I notice it on my shelves? I prefer to think of it as being idiosyncratic, rather than anything else.