Dragonmamma I agree about the 'churning out of babies'.
I think, if we hadn't had a boy this time & knowing my DH's slight desire for a boy, if we had decided to have a 3rd, we may have appeared to be "trying for a boy" and I feel that that almost negates the first 2 children - as if they aren't good enough.
We haven't totally decided whether we're done with baby making, although with a newborn, I'm erring towards being 'done', but at least with one of each, the pressure is off.
I admit, I did actually have a preference for a boy when we were TTC. I guess I wanted the 'one of each ideal family' thing. I didn't do anything major, but read a study that suggested boy mums ate cereal breakfast every day, had a slightly higher calorie diet oh no!! the diet has to stop and ate bananas. So I did all of that, and had a boy. But then that could all be a load of testicles.
However, during the pg, I got cold-feet about a boy & decided I really wanted another girl as I 'knew' about baby girls. In fact, though, you don't know your new baby at all, boy or girl, as they're all individuals, with their own quirks.