Everytime I enter this forum, many guys here are talking about just anime/manga instead of entire Japan-related things, so I decided to create a forum thread about blood types, which is very popular among Japanese these days.
Many Japanese people believe that blood types can affect different personalities. For example, Type-O is very optimistic while Type-AB is more sociable. Blood types can also express negative traits. For example, Type-A is somewhat fastidious (big on cleaniness or picky) while Type-B can be the unforgiven ones.
The blood type thread already exists, so you don't need to post your blood types here.
The only thing I want to ask you, do you believe blood types can affect different personalities?