Personality types

These pictures represent the personalities of the boys very well. Collin likes to lounge and zone out with a good show. Cooie, will do the same however he finds comfort with soft cuddly frogs. He is always toting something or not too far from is toys. Cameron is always playing or doing something. When he plays with blocks he puts them in a nice neat row! Which, I have heard is a boy thing. Collin is outgoing and Cooie is very reserved. Cameron may be too young to tell, but I am leaning towards outgoing since he's a little like Collin. I certainly don't want to pigeon hole them, but I think there is something to the type a type b thing. What makes them that way? Genetics, environment or a combo of both? Birth order? Or just don't define them and see what happens! Regardless, so far I think they are pretty sweet and awesome little people!