The one that might surprise you is "extraversion". According to the study, that means that people:
tend to seek out socially stimulating environments, whereas people high in N [lack of extraversion] tend to avoid highly stimulating environments.
I wonder if they're talking about the State Fair?
Garrison Keillor aside, I think that regional difference has less to do with ethnicity and far more to do with the economy, levels of regional in- and out-migration, and patterns of urban form. And in my opinion, the Twin Cities has a pretty unique culture simply because of its distance from other large metro areas. Much like Denver, Colorado, we're a long way from anywhere else.
[Chart from Renfrow, P. et. al., A Theory of the Emergence, Persistence, and Expression of Geographic Variation in Psychological Characteristics. Perspectives on Psychological Science Volume 3, Issue 5, Pages 339 - 369. -- Click to em-biggen.]
Of course, my octogenarian uncle is convinced that weather causes dramatic differences in behavior, and that long winters discourage violent behavior, creating peaceful societies and social democracy. I keep telling him about ragnarök.