@LatteLove
I'm not saying they would definitely say those things but statistically an awful lot of boys do say/believe such things, because of the society we live in.
I don't buy into gender stereotypes in that I personally believe they are arbitrary and harmful, but I do buy into them in the sense that I think they play a huge role in the societal zeitgeist and it is very, very difficult to raise your child in a bubble from that.
The toy thing is a smaller thing, really, yes most children's toys are boring and we feign interest for either gender, but I do think it's somewhat ironic how many comments there are on this thread saying "I didn't want a girl because I'm not girly and would hate to have to do girly stuff, yuck", and yet it's not the same to say the same the other way around. If I was to have a stereotypical child, in all honesty I would rather have a stereotypical girl, because I remember being interested in such things and I find them easier to talk about. When a little boy tries to engage me in conversation about a tractor I honestly don't know what to say.
I don't think it is unreasonable to say that society will likely push my hypothetical son into being interested in what is perceived as "boyish" stuff and I would not relish the thought of years talking about those things or having to actively push back against the more harmful elements of those things. That's not to say I wouldn't step up and try to raise a boy that wasn't pressured into behaving in these ways, but I do believe it would be an uphill struggle in the world we live in so it's hardly surprising that, before knowing the sex of the child, I might quietly think "god I hope it's a girl".