@Katbagal I like black haired sims best but dark brown is okay also. I also tend to go for browns that are reddish. I am old and grey now but in youth I had very dark brown (almost black) hair with red highlights.
Since I chose the eldest son, Knox, as my heir, he and his wife Tricia, daughter of Apollo Bloom and Marina Prattle of Bridgeport, are the parents of my third generation kids. So far there are two boys, both children. I am thinking I will let them try again and hope for a daughter (not because I want a female heir but because I want to see how the genetics turn out).
Here are the parents, Knox and Tricia
http://i66.tinypic.com/2w3p506.jpg
And here is a group pic of the household so you can see the two boys. Children look pretty much the same to me unless they have extreme features so you will have a better idea of who they resemble when they are teens.
http://i68.tinypic.com/fjnek2.jpg