Well I'm sorry to hear that about your dad. As I said, I am in agreement that he could be pretty clueless and rash. It's just well, he's Goku and let's just say there are certain areas where he "weren't too aware". I suppose Chi Chi had likely convinced herself that she could change him once they were married. Train him to settle down and become more civilized. It's also entirely possible that a lot of it is Goku's Saiyajin blood driving him. From what we know, they didn't seem to be the most paternal of races either. Life was all about fighting and being challenged. In fact, when you think about it, Goku has probably been the most paternal and attentive Saiyajin parent in history!XD Vegeta was of course there with his family too, but it took him a while.
Ah, don't be sorry. When I said 'left' I meant he divorced my mom (who at the time had no job, so we were living off what money he made) which I consider 'left' because I didn't see him for awhile. I see my dad on a regular basis now, but I don't think I'll ever be able to forgive him for two-timing my mom with my now stepmom.
OK, back on topic! What you said about Goku is probably true, seeing as how we've never seen Goku's mother and the only reason Bardock even approached him was because of the visions they were both experiencing.
Saiyajins probably are like people who just go out to fuck here on Earth, except they get pregnant, have the child, and don't see them on a regular basis.
So basically, I think that Saiyajin 'love' is basically just one-time sex. We never see the Saiyajin parents lovingly hold their child, or take them on missions with them (King Vegeta is an exception). Since Saiyajins are always away on missions, it doesn't make much for a family lifestyle.

I really, really need to get back into the habit of posting.