Given that I have both genders... 1 girl and 2 boys (and I was a bit freaked out when I was told I was having a boy the first time) I can safely say that you are going to love having a son. My boys are very different: my older boy is gentle and quiet... my youngest is chatty and active. But Both are big on affection.

Raising Boys by Steve Biddolph will give you some good insight on what it's like to have a boy. They are meant to go throught stages of being mummy's boys and daddy's son! this correlates with their hormonal development... it's healthly and natural. Some families try to mess around with this process and insist that their sons stay one or the other. Some dad's never want their sons to appear "wussy" or ever be a mummy's boy. This can cause real problems, especially in how the boy relates to women in the future, for example.

Anyhow... going off topic... relax you are about to fall in love all over again!!!