No vague questions to answer in this personality test. It's all in your blood. (Apparently personality by blood type was a fad in Japan) Me: http://www.abo-world.co.jp/english/o.html A Type O can be either your friend or your enemy, depending on whether a mutual trust exists. Once trust is established, Type O's are open and faithful. When this trust is missing, or when it is a first meeting, they are highly guarded or even competitive. Type O's base their interpersonal relationships on making followers and friends, something which makes them highly sensitive to the way others feel towards them, in some cases overly so. At times, their assertiveness may be so overbearing that people pull away. When it comes down to it though, it is simply impossible to hate a Type O, and that could be considered their greatest virtue.