I have 3 boys and would love a girl so I wouldn't continue to be told about how different they are, I would KNOW, then I could tell them what I suspect that they are all different and its not just a gender issue.
I have a brother, there is 15months between us, I did everything with my brother, I was a complete tomboy played hockey and rugby at school, love camping, sailing and hiking - I'm convinced if I had a girl she most likely be the same as thats how I'd bring them up, my mum is the same.
When mine are being boisterous, stubborn and messy I love the fact that my mum compares them to me as a child weird I know but it takes away some of the gender specific behaviors that people tend to label boys with.
My 2 (hard to say about ds3 as he's only 6 months) are very energetic but also extremely loving, creative and enjoy all the things people seem convinced only girls like like reading and puzzles. I think I lot of girls would like to fly paper airplanes, kick a football and swing from a tree but some parents don't tend to do that with them - it the same way people look at us strangly when ds2 (just 2) brings his doll everywhere with him, I have been told by one mum 'it'll make him gay' and 'was I hoping for a girl' WTF?!?
I also hate the fact that some mums (usually ones with boys and girls) excuse their boys behaviour when they are being a handful as just being a 'typical boy' no its just bad behaviour
I'm rambling now - nice to have a vent, I have to be honest though I would like to have dc4 and I would Like a girl, I'd just like to experience bringing up a girl for myself and see if they are different although I love my children to bits and wouldn't swap them for the world, I bled heavily throughout my pregnancy with ds2 so was just so relieved he arrived safely and ds3 ended up very ill in hospital at 4 wks old - kind of puts it all into perspective... all academic dh says no more 3 is enough, I think it was the 18 month age gap between each one that put him off!