So I have 2 kids. I always find it interesting to watch their different personalities emerge. You'd think, given that they both have the same mother and father, they would have somewhat similar personalities but nothing could be further from the truth.
My children have very different personalities. My son is very much in his own head. He is willing to engage others in whatever is going on in there, but he can also play by himself for hours. My daughter loves to be around others and involved in whatever interesting thing seems to be going on around her. My son is willing to put up with hugs, but is generally very passive about them. Rarely does he initiate. My daughter just loves hugs and any kind of touch. Constantly needing to have some kind of contact throughout the day.
And as they grow and interact with others more I see more facets of their personalities come to light. One thing is for certain, it is never boring when there are kids around!