I have 2 kids, a boy and girl and (cliche) they are my world. I do want to have more, in the future, I came from a semi-big family. My hubby on the other hand was 1 of 2 kids, he wants more too though (even more than me!) Having kids for me is such a fulfilling role and there is nothing I wouldn't so for them.
On the otherhand, my married friend and his wife in no way shape or form want kids at all. I think it's sad that they have to explain to others often WHY they don't want kids, it's their decision? They get people saying "oh, give it a few years and your wife will be begging you" no, 1. it's not always then woman that wants children 2. they do not want kids hand downs!
But then again they also have two doggies that they treat as their babies 