I've never been sick with any pregnancy. I honestly thought this one was a boy, because I never got sick with my boys, but we were told it's a girl, so I was shocked! The only difference in this pregnancy is that I bled a little bit, twice, in the first trimester - that had never happened before. Other than that, all of my pregnancies have been surprisingly easy with the same symptoms (sore breasts, tired).
I have a friend with three boys and she had a much different pregnancy with her third (lots of sickness). She's pregnant with her last one and they don't know what she's having yet, but she's been sick with this one too (she thinks girl).