I didn't realize that once we found out whether it was a boy or a girl how different I would feel... it's not just a "something" in there anymore, there's a real baby boy! The first few months I would walk around the house saying "There's a baby in my belly!" (it only annoyed Nathan a tiny bit, haha) but now I'm saying "There's a boy in my belly!" It keeps things interesting around the house.
Today I was doing the hair of the little girl I babysit and as she turned her head to the side (while I was putting it in a ponytail... sheesh) I thought how glad I was that I only have to worry about my own hair for now (at least until/if baby #2 in a few years is a girl, then I'm in trouble.).