I d ont know what kind of blood type I have but when I was visiting my host family kept asking me if I knew my blood type. I asked them why and they said "just in case I get in an accident". I later came to find out that the Japanese have a superstition that your blood type dictates your personality (kind of like your birth year on the Chinese calendar or astrology sign).
I found this @ http://cicbb.justbusiness.net/WhatsNew/April-2002/Personality.html
Your Blood Type Personality?
According to Japanese researchers, certain personality traits correlate to specific blood types. What do YOU think?
TYPE O You want to be a leader, and when you see something you want, you keep striving until you achieve your goal. You are a trendsetter, loyal, passionate and self-confident. Your weaknesses include vanity, jealousy and a tendency to be too competitive.
TYPE A You like harmony, peace and organization. You work well with others and are sensitive, patient and affectionate. Among your weaknesses are stubbornness and an inability to relax.
TYPE B You're a rugged individualist who's straightforward and likes to do things your own way. Creative and flexible, you adapt easily to any situation. However, your insistence on being independent can sometimes go too far and become a weakness.
TYPE AB Cool and controlled, you're generally well-liked and always put people at ease. You're a natural entertainer who's tactful and fair. But you're sometimes standoffish, blunt and have difficulty making decisions.