I agree w/ one other mom who says that she feels like she has two families, I have my teens and then my little ones who are under six, the whole spacing thing is really up to you I thought I was done when we had the older 4 but when the youngest of that group was 9 I decided to go for it again, I can say it was a big adjustment, I had been sleeping through the night, letting the kids get themselves up for school etc,.. and then came the night waking, no more sleeping late, and the constant demand, I like them a little spaced in between cause they are little more independent, but have also done the REALLY close togather, my oldest 2 are Irish Twins, only 11 months and 20 odd days apart, and that was challenging, but also nice becuase I was already in the mode! I don't think there is a right or wrong answer, there is only what your heart tells you!