As a photographer, I am slightly addicted to bags of various sizes in order to schelp not only my normal stuff (lip balm, gum, hankie, contact lens case, book, pen, paper, ipod), but also my photog stuff, sometimes just an SLR with a lens attached, sometimes one or two other lenses, sometimes a flash, sometimes a lensbaby, battery, etc.
I am also slightly addicted to Flickr. (Mark will say I need intervention.) Flickr has a group titled, "What's in Your Bag?" where people not only discuss bags, and what's in them, but they also photograph the contents. It's kind of fun if you have a moment in between other stuff that you HAVE to do.
Go here to explore: http://www.flickr.com/groups/52241283780@N01/
This group has over two thousand members, so it must be interesting to others, too!