I just read an article about interviewing Li, Yongbo - Chief Coach of China badminton national team. A point he mentioned is quite interesting. He said, according to the statistics from China team (I guess it may not be very systematic) , many (or most) champions are with type AB blood. Right now there is no further evidence to prove this point, but seems blood type does affect on the natural personal character and psychological quality, which in turn works on person's activities like sports skills/levels, etc. What is your blood type? Maybe you are potential to be the next champion, amateurish or professional. Who knows?