Yes it's definitely the result of other people. I always preferred boys and it seems like I've been pushed into wanting a girl but now feel like I'm missing out if I don't get one.
My 3 boys want a sister as well. My eldest was so convinced my last would be his sister that it took a full week to make him believe us that it was a boy and we had seen the evidence.
Going by DH family I think we will only have boys, and I'm confused over this one, my instincts have been right with my boys but I don't trust them this time because they say girl, but I think it's wishful thinking and my head tells me to be logical and that it's a boy.