Well, my sims have had four children (yes I'm mean) and they all have different personalities, though every single one of them turned out nice. The least nice one has 5 or 6 nice points. Have you noticed that some sims born in game have more points to use than CAS sims? I'll try to remember to post a picture of Ariel's stats. She's super shy (1 outgoing point) but nearly maxed out on everything else. She's got 10 neatness points, 9 niceness points, and 7 or 8 in the other attributes. (This is off the top of my head, since I'm at work, so I could be off a little). Anyway, that seems like more than her fair share of points. Not that I'm complaining. She's a teenager already (I had a fun day yesterday!) and a knowledge sim. Talk about a potential overachiever.
My sims kids end up that way a lot of the time. I always attributed it to the fact that I tend to pair up sims who are opposites, and (my un-informed quess) that when choosing the genetics the game fills in with the same number of points as the parent with the highest level in each catagory.
My legacy family had 4 girls in a row. All with black hair, green eyes(except one with grey eyes). I saved before their most recent birth and they had another girl, so I left the lot and came back and they had a boy. ALL of the kids have black hair, sadly. I wish one would have red hair! Too bad for genetics. Alot of the grandkids have red hair though..
This is a really really old thread, dear, and you're way off topic. If you want to discuss your legacy sims by all means start a new thread to that effect. We try not resurrect the dead here. (Save it for the game, LOL.)