When we started our adoption journey, and really our TTC journey, I assumed all along that I'd have girls. I only had sisters, I don't know what to do with boys, I needed girls only. And I assumed I'd have two. Then we ended up adopting and our agency didn't allow families to choose based on gender. Their rationale was, people who conceive their babies on their own don't get to choose (yet), so why should we? I was okay with that, made sense....
Now we're working on #2, through foster care. EVERYONE (friends, family, perfect strangers) are assuming we'll ask only for girls. After all, we need to have one of each, right? Except that DH and I really just want another boy. We love our boy, and want another just like him. And we already have all the clothes.... ;-) It just seems easier somehow.
And yet, we have not narrowed our profile by gender. We are open to just about any race, and any gender, and any religion, etc. I want another boy, but if we're meant to adopt a girl, then that's what we'll do and we'll be happy with that.
So while I'm not exactly going about this the same way you are, it seems like we're definitely in the minority. Just about everyone else we know has chosen/would choose based on gender, or at least has strong preferences one way or the other. Just do what you feel is right for your family -- the best advice I've ever gotten on this board, and it applies to so many different issues!