So every site now has some form of "what's in your bag" post. Sometimes those are pretty cool, for example you find out a writer you follow on Twitter never leaves home without two specifically adjusted paper clips for popping out SIM card trays.

I tend to carry more stuff than I'll need on any given day, my laptop, a notebook, pens, and usually a camera of some kind. Usually I'm carrying this around:

For my needs it works fairly well but I've been contemplating getting a more "grown up" looking bag. Suggestions?