I have to admit that I prefer not to use rucksacks. I wear them when I actually have to carry around something heavy, but I really prefer to keep my computer and reading glasses in the office, and just carry my packed lunch around every day. So I only use handbags and such, but I have to admit that I could have lived with one of these rucksacks from Yang Du. An own or crocodile, perhaps.
If you like it, there are a lot of cool meets fun clothes from the brand as well, I would try ebay or something.