We have two girls (ages 13 and 11) and when they were really small, I used to say I would like another but "only if I could be guaranteed another girl". My husband would say we'd do it again "if we could be guaranteed a boy". He loves the girls but I think deep down all men would love to have a son. He got the best of both worlds though, I think, because both of our girls (one more than the other) are very athletic and love to deer hunt with daddy.
Personally I don't see anything wrong with gender selection if all you do is "pick" the sperm you want. It's not like you are aborting the one you don't "want".
With that said, I do remember "doing the things you should do" to get a girl when were trying to get pregnant. Supposedly the little boy sperms are a bit slower at swimming so a certain position gives the girls more of a chance than the boys. Not sure if it actually works that way, but I got the girls I wanted!