Personality differences across religious affiliation is interesting. Let's use MIDUS data to look at Mormons (sample size = 3,960, 76 Mormons).
Open to experience
There are no significant differences. It turns out that, in terms of personality, Mormons are boringly the same as everyone else. (I hypothesized that they would be more agreeable, more conscientious, and less open to experience. I was wrong on all counts.)