I guess it's a case of the grass being greener! I had 2 dd's and then had a ds and was over the moon! I think it's just about wanting to experience both, really. My friend has just had her 3rd boy (and we were all so sure it was going to be a girl!) Makes it difficult to know what to say- I think deep down she will be just a teeny bit disappointed, but you can't really talk about that somehow, can you?
Anyway, to cheer you up, having had both, I'll give you the downsides of girls:
You have to do their hair every morning- I'm not a girly girl at all, and I find this a real labour of love, not to mention blummin time consuming!!
If you have a girly girl (like dd1) they want to do ballet and it costs you an arm and a leg (ballet show tonight, £20 for a costume, £10 x4 for tickets, shoes, tight, leotards, lessons.....) I envy my friends with their boys and their one pair of football boots!
They want things like Barbie dolls, which I hate with a passion.
dd1 is 4 and oh so bossy!!! She wants to be mum, and frequently tries to act like she is! Boys seem a bit more affable somehow! She can also argue like a barrack-room lawyer!
Dresses are a pita to iron, and girly colours are horrific to keep clean- tomato ketchup is far more easily hidden on a pair of jeans than cropped pink trousers!
I'm sure there are many more! I'm also sure my relationship with my girls will really be put to the test when they are teenagers. I found MY diary from when I was 14 and had to call my mum (this was 10 years later!) and apologise!! I was soo vile to her, while remaining a right daddy's girl!