I don’t believe judging one’s personality by blood type.
Do you think blood type can affect people’s character? In Korea, many people tend to believe that people with different blood types had different personalities. But I don’t think it’s reasonable.
We can see lots of information about blood types on the Internet. Personality, love style, even study style are classified by it. Even there are movies, songs and books based on blood type. These many interesting stories related to the blood types have only been known to Koreans and Japanese. It’s very popular though. But many scientists said there is no evidence. They have researched and studied it, but they found there is no relationship between character and blood type. From a commonsense point of view, how does it possible to divide billions people’s personalities into by only 4 types? There are lots of factors that make one’s personality such as environmental influences. So each person has their own character. It means any of us has the same personality with others.
Individual personality is influenced by not only his or her blood type but also his or her circumstance like family, friends, educational backgrounds and so on. So I don’t believe the authenticity of dividing personality by blood type. It’s just such a stereotype for fun. 