Closeup look at red blood cells
Apparently the Japanese, those people who practically set the trend for modern technology and electronics, take this concept seriously. Most though would relegate this into the realms of superstition or like the belief in astrology, that Zodiac signs determine personality.
I was brought-up thinking that more than anything, you're going to have an active part into what you'll turn out to be, in spite of biochemistry or circumstance. We could also think in terms of how "the whole is greater than the sum of its parts" or the conceptual model for strong emergence.
The strange thing though is when I read what the article says about my own blood type, it was a fairly accurate description of my personality (not "personhood " though uhurmm, hrmm, ahem)!
What do you think?