I would comment on your image there iluvdvds but photobucket is blocked at work so I can't see it.
I'll have to have a butch later on.
I arrange my DVDs by horror, comedy, tv shows, stand-up and then the rest, all categories in alphabetical order. However, I don't have a great deal of space for storage so they end up in growing piles around my room. My blurays are all just in alphabetical order but soon I may have to think about putting them in genres as I've just passed the 100 mark.
I realise this probably isn't much of a milestone for many on here but I'm still going to celebrate.