There is always a pro and con argument for any amount I think. Currently pg with my first (due in October) and that was a major dilemma of umming and ahhhing, is the time right etc questions. Finally just decided to do it and get on with it and we're so looking forward to Oct when our little bubba comes out!
Both me and DH are from one of three sets of siblings. I have an older and younger sister (three years apart in both directions). He has an older brother (18 months difference) and a younger sister (nearly four years difference).
We're both adamanat that we don't want to have three children. We've settled on having two. I think its mostly due to the "middle child syndrome" which we both seem to suffer from. We both are of the opinion that growing up, everything we did wasn't as special as we weren't the first, nor were we the baby of the family. I know my mum and dad love me as much as my sisters, just as I know that DH knows the same about his parents.
No doubt, even though we've said we'll only have two, we'll end up considering a third in the years to come. What we'd decide, I don't know. I know that I wouldn't want to have just one, as I know my cousin is an only child and desperately wants a bro or sis (she's nearly 10 now). I hope I'm able to have two - you never know what hand you get dealt. But, at the moment, me and DH are sticking to our "only two" plan of the future.
Go on, slate me for my comments!