I like Spring best when the skies are blue. York Street, Sandy Bay. September 2011. I have A-Negative blood type, which puts me in the company of 3.52 percent of the World's population. Apparently, I should be careful when travelling to parts of the world where supplies of RhD negative blood are rare, particularly East Asia, or at the very least carry a suitcase full of my own blood about with me. Moreover, type A-negative donations are in high demand for red cells, but I've never been stopped in the street and asked for it and have not figured out a way to turn those desirable red cells into hard currency.