Robin Hanson writes that "you might expect people to feel more affiliated with people who they can choose," but he thinks the opposite is true:
Contrary to what many say, I’d guess most people really did love their king, really do love their partners in arranged marriages, and feel comforted by their connection to longtime neighbors, friends, and employers when the relation would be costly to break on both sides. Because we are most stuck with them, we tend to love family most of all.
The Dish 