In the 1930s, the Japanese embraced the idea of matching personality traits with one's blood type. This phenomenon is as popular in Japan as the idea of matching horoscope with personality is in America. Almost all Japanese are aware of their blood type.
A While outwardly calm, they have such high standards (perfectionists) that they tend to be balls of nerves on the inside. Type A's are the most artistic of the blood groups. They can be shy, are conscientious, trustworthy, and sensitive.
AB Type AB's are the split personalities of the blood groups. They can be both outgoing and shy, confident and timid. While responsible, too much responsibility will cause a problem. They are trustworthy and like to help others.
B Goal oriented and strong minded, type B's will start a task and continue it until completed, and completed well. Type B's are the individualists of the blood group categories and find their own way in life.
O Outgoing, and very social. They are initiators, although they don't always finish what they start. Creative and popular, they love to be the center of attention and appear very self confident.
I am O,but not sure about having either + or -.
I am often guessed by people that I am AB.Well,it is not big issue what sort of blood type people have or not;however,it could be one of the ways to start conversation.
I wonder what type of blood Gandhi had.