Crazy People, "Well-Adjusted" People

Jeff VanderMeer has an intriguing post up about authors coming to realize that they've been writing about "crazy" people. The discussion about this has included a related question that had been eating at me earlier in the day, about how come a reader will rarely encounter a truly "well-adjusted" character in a novel. I highly recommend that all people reading this to click on the link above and to read through the discussion that ensued, as I think it's something worthy of further exploration. Also, if you have any thoughts on my question, I'd love to hear them as well.