Ah yes of course - the 'complete' family. I've had people ask if I really wanted a girl. 
'Oh yes, I'm just selling DS2 on eBay and then we'll be trying again...' *
*Disclaimer - this is of course a fib.
I do weirdly think though that there is a tiny bit of me that thinks about what it would have been like to have had a girl. However, I think it's just that I was either going to have a boy and a boy OR a boy and a girl. We aren't having any more DC so I think whichever I'd have had, it eliminates the other possibility iyswim?
So maybe I might see girls clothes in a shop and think 'oh, I'll never be buying girls' clothes'. But had I had a girl there would have been things about having 2 boys that I might have missed. Even if It was just putting ds1's clothes out for charity and thinking 'oh, we won't get to use that lovely jumper again' or whatever. So I think it's just because I'd thought about both possibilities when I was pregnant iyswim.
I just need to clarify there again that, like Scarlet, I am delighted to have ANY DC and I couldn't give a flying fig what flavour they are.