Nobody really knows if your blood type and your personality type are linked, since there has been no proven correlation, but there are cultures and societies that believe they are. This is particularly common in Japan where magazines publish blood type horoscopes and people will often be asked their blood type as part of the job interview process to see if they’ll be a good fit in the position.
Maybe blood type should be used for more than just matching organ donors. Maybe blood type could be good for matching people. Ask on your next date and then use this list to see if you’ve found your perfect type.

A TYPE (A+, A-)
One of the more populous blood types, As are reportedly cooperative and sensitive, while being smart and passionate perfectionists. They find it important to get along with others and tend to bottle up their feelings in order to do that, sometimes making them uncomfortable around people. They can be shy and withdrawn. They can be tense and impatient, but stay calm in a crisis because of their strength. A types are very responsible and crave success, but are sometimes unable to sleep well because stress affects them internally a great deal. Because of their innate sensitivity, As are thought to be very creative and the most artistic of the blood types.