I was very amused to learn that south-asians like Koreans and Japanese make a great deal out of blood types. Apparently B types are bad boys, yeah! Wait, it gets worse.

In south-Asia (India excluded), the subject of linking blood types to personality took off with the 1927 publication of a series of articles by Japanese scholar Takeji Furukawa called "The Study of Temperament Through Blood Type."

The concept hit pop culture and mass media in 1971 when Japanese writer Masahiko Nomi expanded upon Furukawa's ideas and wrote "Understanding Compatibility from Blood Types."

Type-O people were described as outgoing, expressive and passionate. Type-A were considered introverted perfectionists while type-AB were an unpredictable, distant lot.

And then there was type-B. They were considered independent spirits with strong personalities. That exactly matches my personality :)

However the cultural stereotypes projected are much worse. There are many characteristics associated with type-B people, but the bad rap going around about type-B men in Korea is that they are selfish, mercurial and absolutely useless as caring and devoted boyfriends. Personally I am not selfish even by the most restrictive definition of the term, but I don't know the part about "caring and devoted boyfriends" because I never (this is not a typo) ventured into dating scene.

According to a nationwide survey in South Korea conducted by Internet portal site xyinlove.co.kr, type-B men were considered to be the most difficult type to date and about 40 percent of women said they did not want to marry a type-B man. Source

So if you are in Korea and you are type B and you intend on dating Korean women then be sure not to reveal your blood type or better yet say A (all is fair in love and war). I wonder if they will go as far as requiring to see your blood test report before saying "Yes" to your bended knee proposal.