When they were born, they were all potential. We couldn't do anything but start screwing them up from day one. So, when we see characteristics in our kids that are reflections of our best selves, it's a big check in the win column.
I know that no two children have the same set of parents, even though they live in the same family. Why? Because parents are different with each of their children, and no two children ever take the same role.