I too have two sons, in their mid 20s. I honestly never missed having a girl, though I will admit that my late Dh did, somewhat...Part of my reason is that I felt that I'd have been terribly hard on/critical of a girl, due to my own upbringing. But, you get what you get. If I'd had a girl, I'd have had to do my best to get past my own background.
But I still found it incredible that so many people thought (well, still think) that a successful family must include children of both sexes. Around 20 years ago I knew a family that welcomed their third daughter/third child and seemed to feel the need to declare "our third girl, and we are so happy!" Of course they were, but it seemed to be a defensive-happy (as in, they mentioned it within about a half-minute) - almost as if they were trying to fend-off "oh, too bad that it wasn't a boy".
But of course there was good old Queen Victoria. Upon the birth of her first child "oh, Madam, it is a Princess", her reply was "never mind, the next one will be a Prince".