I have one of each ("oh clever you" I was told so much after DS was born
) and I love them equally. Truthfully though when I was pregnant with DD I wanted a girl. All my life I'd heard my mum go on and on about girls being best, how she only wanted girls, how my dad said he'd only ever wanted girls (they had 2; me and my sister). So I was biased, but I had been made biased, if that makes sense? Then DD was born and I loved her and it was around this time that the fiery feminist in my was unleashed and my mum realised how difficult girls can be when they grow up to challenge every previously accepted life rule and my sister did the same. I worry sometimes that I have inherited so many bad qualities from my mother that I will screw up my daughter. I don't have the same fears about my son; the unknown territory of having a boy in the family is oddly comforting!
My mum was disappointed by my second child being a boy and she struggled to bond with him. I resent her for that and I don't think I'll ever forgive her totally, despite the fact that she treats them equally at the moment.
Interestingly enough MIL was the opposite. "Boys are more loving" she cooed, conveniently forgetting how her middle son was and still is a violent thug (largely created by her crap parenting), her eldest son (DH) can barely stand to be around her and how her two daughters are always there for her yet never quite revered as much as her sons.