I've been digging through old Pendragon books and I would glance at the family section, they always have a family section. Then I was listening to RPG Circus and they spoke about how gamers like to play loners in a group. Rarely is family considered. In fact family is seen as a weakness. Something to be used against a player. I got to thinking in all my years of playing I can only think of a handful of times where I had some sort of relationship with a family member. And in all those times they were used against me as plot devices.
But hold on. It doesn't have to be that way. Or at least not all one sided. What if a player benefited from having a family? A father who dispensed advice even though some of it was completely off track. Maybe dear old dad is an ex-adventurer who knows the location of a dungeon or two or knows some tricks of the trade. Mother could be a kick ass spellcaster or a can pick a lock with a smile and a simple pin. Brothers and sisters who can also be rivals, but also have the attitude 'no one is allowed to beat up my brother, but me'. A family as a valuable resource instead of a constant victim would be a nice change.