My parents divorced in 1977...I wasn't even 2 yet.
From what I've heard, my father was incredibly abusive, both physically and mentally. Fortunately, I don't remember any of the physical shit.
The mental abuse though...that continued through childhood. My father was, and probably still is, an incredibly mean-spirited individual. As a child, he would say some horrible things about my mother...it would cause rifts to the point where we wouldn't talk for 2 years in a couple of spots.
Finally, things came to a head in late '94. My father got pissed over something incredibly silly, and decided to disown me. We've exchanged a few barbs here and there since, but haven't had any contact in over 5 years.
Fortunately, since Rho and I have decided not to have children, that issue won't be a factor should we ever divorce. Of course, Rho and I have to get married first before we can divorce.