We could've afforded one or two more, but we stopped at two because it was a good balance for us between work, family, and personal interests. Neither one of us wanted to be a full time stay at home parent, and neither one of us wanted to subsume ourselves and our lives to the basic biological imperative just to have a bunch of kids.

Kids are a big commitment and a lot of work. I feel like having two gave us enough leeway to have the time and energy to devote to them as individuals when they needed it. In a larger family, that might not work out as well.