To clarify, when I said "neurotically conscientious" I was referring to two of the traits in the Big 5 personality assessment scheme--neoroticism and conscientiousness. So not an "atypical mind state" so much as an ingrained way of viewing the world.

So in response to "what personality traits would you associate with meat eaters?" I would say, closer to average levels of neuroticism and conscientiousness, and hence also closer to average levels of anxiety and depression.