[Bear with me a moment here; I don't come to this conclusion (or, rather, supposition) from some a priori bias. And I love Woody Allen movies, so it's not a big insult or anything.]
I was watching CBS News the other night, and they had a story on about how people in all fifty states had been rated on the basis of five basic personality traits. I found this pretty interesting, as I generally do when demographic or geographic and psychosocial characteristics are studied in concert. But I really perked up when they showed the map that highlighted the most neurotic states. I am a political junkie (a DKos poster with a UID of 1115, a political junkie?!? Get out!), so the pattern of states looked awfully familiar, I thought.
A little Googling confirmed my memory. It's not a perfect match, but it's still uncanny, I think. You be the judge:
Democratic Primary Map
Personality Maps
(NB: The second link goes to Extraversion by default; you have to click Neuroticism on the left to get it in the main map.)