I was looking at another WordPress Motorcycle Blog (Helmet or Heels: I’m comfortable in either!) and saw this info-graphic from MotorcycleRoads.com. I think this is a good portrayal of a something that is not only hard to quantify, but to display as well. By the way the Helmet or Heels blog is very nice and I am following it now.
If you go the MotorcycleRoads.com site, check out its Top 100 Roads list. There are several within riding distance of our home and I think we will check them out eventually.