Canadian Blood Services has prepared a small pamphlet called what's your type? which seems to have its roots in the same Japanese ideas that are so well described by Japanese Blood Type Superstition. They give "most likely occupations" for each blood type:
Type A
Type AB
Type B
Type O
CBS also reports that cats have 4 blood types. They do not indicate how cat transfusions match up, nor if cat blood is interchangable for human. No, let's not try it and see.
* Really. I kid you not.