Blood types and personalities
The concept of relating your personality to your blood type (血液型 = ketsu eki gata) is very popular in Japan. In fact, this is quite similar as asking for your Zodiac sign. Blood type horoscopes are as popular in Japan as astrological horoscopes in other countries (like the Philippines). This concept/belief has even crossed over to nearby countries like Korea and Taiwan. 
Below are common personality traits as determined by blood types:
TYPE A
Best traits: Conservative, reserved, patient, punctual, perfectionist and good with plants.
Worst traits: Introverted, obsessive, stubborn, self conscious, and uptight.
Famous type A people: George H. W. Bush, Ayumi Hamasaki, OJ Simpson, Britney Spears, Alan Alda, Adolf Hitler, Lyndon B. Johnson, Richard Nixon
TYPE B
Best traits: Creative and passionate. Animal loving. Optimistic and flexible.
Worst traits: Forgetful, irresponsible, individualist.
Famous type B people: Akira Kurosawa, Jack Nicholson, Luciano Pavarotti, Tom Selleck, Mia Farrow, Paul McCartney, Leonardo diCaprio
TYPE AB
Best traits: Cool, controlled, rational. Sociable and popular. Empathic.
Worst traits: Aloof, critical, indecisive and unforgiving.
Famous type AB people: John F. Kennedy, Marilyn Monroe, Mick Jagger, Thomas Edison, Bob Sapp
TYPE O
Best traits: Ambitious, athletic, robust and self-confident. Natural leaders
Worst traits: Arrogant, vain and insensitive. Ruthless
Famous type O people: Ronald Reagan, Queen Elizabeth, John Lennon, Paul Newman, Elvis Presley, Gerald Ford, Mikhail Gorbachev, Al Capone
Source: Wikipedia
So, what's your blood type? Be honest, and don't change your blood type just for this mini-survey! 

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