I have always said I want to have all my kids before I am 30. Lucky for me I was married at 23, LOL. I guess it would be hard to have kids if you don't find the one you want to have the kids with before that cut-off age, hey?
Life tends to muck around with our plans tho. Who knows, it make take a while for us to get preggo with the next one (we won't start trying again for a couple of years) and my plans will go out the window! I guess it pays to be flexible.