I've recently read an article on the affect of blood type on a persons personality. I've been trying to study the validity of this theory in relation to the Myers-Briggs personality types. I'm an female ISTP with a type B blood type, and I have 2 other ISTP friends. One is a female type A, for sure, and I think the other one is a Type O (male). Would anyone else be interested in exploring the differences in ISTPs with different blood types?