Looking to the sky to save me

Just like the west and the chinese have their astrology and horoscopes, the Japanese have their own system of predicting a person's personality, temperament, and compatibility with others through their blood type.

Japanese Blood Type Personality Chart

• Type A
  Best Traits:
  Earnest, creative, sensible.
  Worst Traits:
  Fastidious, overearnest.
  
• Type B
  Best Traits:
  Wild, a doer, cheerful.
  Worst Traits:
  Selfish, irresponsible.
  
• Type AB
  Best Traits:
  Cool, controlled, rational.
  Worst Traits:
  Critical, indecisive.
  
• Type O
  Best Traits:
  Agreeable, sociable, an optimist.
  Worst Traits:
  Vain, careless.

Its application are quite evident in the anime and gaming circle as blood types are often tied down to a particular character's stereotype. Well I've never believed in any of this tripe and especially not now when Type O is listed as being 'sociable'. Pfft!