I didn't vote because so many of those were right on, and I'd choose one, ponder it, then take it back, and finally decided that not one alone best fit us....
We always wanted four children, and we wanted four because DH has lots of sibs and I like large families (I know, I know, to some, four isn't large
), and I firmly believe that everyone should have a sib if it is at all possible. In our older age, who better understands the wholeness of our lives than our sibs? Who else can truly commiserate about our parents' craziness than our sibs? IMO, nobody. So I truly believe that sibs are good for that reason. And I also believe (and hold on to your hat, this is likely to be somewhat controversial) that only children have a selfishness that is almost insurmountable, and that it stems not from any terrible thing that the parents have done or that is in the person, but from the mere fact that all of that person's young life s/he has not had to share time, love and resources, thus it can be a terrible shock when the person marries and has children and suddenly has to divide time and attention, etc. Now, my two closest friends are onlies and I love them dearly, but I watched them really struggle with having families and giving up that sanctity of self. They are both exceptionally bright and loving people, but their primary complaints regarded those kinds of things, and so I attribute their struggles to having been onlies.
I also think it's healthy for parents to have less focus on any particular child. When you have only one child, you are able to attend to every little thing, but once you add another into the mix, you've suddenly lost a little focus, and, from my perspective, you give both kids a bit of a breather now and then, and I think that's healthy...now, that's from my overly anal perspective. I really
focused on my ds before dd was born, and now I'm more likely to let some things slide, let him struggle just a tad now and then and find that he's capable, etc. It was harder for me to do that before dd.
And ultimately, I just picture kids running around our house, instead of kid. After dd was born, DH and I agreed that we were taxed and that the labor intensivity of AP parenting, while well worth every moment, might preclude us from having any other children. Now I'm starting to picture a third child in our family though, so we'll see. One of my friends said to me once that if you are asking if you should have another child, the answer is yes. If the answer is no, you simply know it.