Spinamum, have read the whole thread, so know you're in a better place with this now, but thought I'd post you my feelings on the subject.
Before I got pg I thought I'd like a girl - you know, in the idle "my children will be" kinda thoughts you have when you have time for idle thoughts (ie before you have babies!) - no strong "I must have a girl or I shall weep forever" sort of way though, just in passing sort of thing.
When I got my first positive, with DS1, I knew he was a boy - and the idea that he might be a girl actually made me feel nauseous (seems weird to say that now - pg hormones, maybe?!) - pink dresses made me feel queasy, the idea that I might have a female baby inside me felt really, really strange (blimey - I'd forgotten this!). It didn't even occur to me that he could be anything other than a boy.
I didn't "find out" what he was at the scan, because he was a boy - I knew that. I was SO certain he'd be a boy that when he was born and I held him for the first time, I looked at his face and my very first thought was "oh, there he is!" - before I found out for sure he was a boy.
When I found out I was pg with DS2, it was a totally different set of circumstances - he was conceived naturally (DS1 was conceived on clomid), I was so sick during my pg, nose was stuffy, I was queasy till nearly 19 weeks, I didn't go off sweet things like I did with DS1 (the word biscuit made me feel sick with him!), I got diabetes, etc, etc. So I wondered whether I was having a girl - and the idea didn't make me feel nauseous like it had done when pg with DS1.
But I didn't want a girl - I had to get used to the idea in case I did have one. My problem with girls is that pretty much until I was in my 20s, I didn't know any nice ones - I went to school with a shower of bitches, I went to university with a pile of shallow vacuous bints (bar a couple) - I don't have very many female friends at all - not from pre-MN anyway. So I knew I'd be more comfortable in a house of boys.
But I didn't have that strong "definitely a boy" feeling I had when pg with DS1, so I wondered.
And when he was born and he was a he, I was very happy. Had he been a she, I'd have loved her utterly, I'm sure - but I wanted another boy.
In fact, my only problem with having boys is naming them...
However, when people say "oh, you'll be trying for a little girl next then?" I want to bite their noses off. If I DO have another baby (and it's doubtful I will), people will assume it's because we want a girl - and make the "oh you got your girl" or "another boy, never mind" comments accordingly. Grr!