I have two fantastic DSs and am currently 30+5 with no 3 (almost 5 year gap between the last 2), who we have found out is a girl.
The 'are you trying for a girl', 'fingers crossed for pink this time' etc along with the 'was it planned' comments' started almost straight away. They bothered me at first, but now I've calmed down, I tend to think that generally people are just trying to make conversation and don't really mean any harm (well most of them anyway). I hate comments about bump size far more!
My answer has always been something along the lines of 'We planned to have another child, all children are special, boy or girl - don't you think?' I usually find that they then back-peddle really quickly, as the question has been turned on them.
We didn't just want a girl, or even a just baby, we felt that we wanted another child to be part of our family and yes we do feel that our family will then be complete, but that would have been the same had it been a boy or a girl.
My MIL is quite difficult to handle as she had 2 boys then a girl and admits she would have kept on trying until she got 'her girl'. Ironically, her daughter is much, much closer to 'Daddy' and the two of them have a very difficult relationship.
Actually, I am quite apprehensive about having a girl, as I feel I know where I am with boys and everyone keeps telling me they are very different. Even the baby shopping has been a bit daunting, I'm so not used to pink and I only realised after being bullied into buying a couple of dresses that of course you have to buy tights for girls to wear as well and that set off all sorts of 'oh no, the nappy changes will be harder' type stress.
My girl will almost definitely be a tomboy, her eldest brother has told me he intends to teach her to be one (his best friend is a real tomboy). I have kept quite a few of the boys little denim dungarees as I figure girls can wear them as well as boys and I am fully expecting to get comments about that too, particularly off older relatives who seem convinced she should be dressed in permanent pink, sparkles and broiderie anglaise.