I lived on the MN side of the MN/ND border for almost a year. The most frightening thing was how honest people were. Kind of spooky actually. I did hear some horrible stories about a town called Mandan. Apparently some of the teenagers smoke pot and on occasion some guys will get drunk and shout loudly.
They have a saying up in that area, "Sure it's cold but it keeps the riff-raff out."
During my brief stay, I found that to be quite true.
Bismarck in my opinion is the cleanest city I've ever seen. I don't know if the folks just keep it clean or the perpetual wind just blows all the trash away but either way it's clean.
I didn't live in ND but being on the border, I spent a great deal of time exploring. I will list the things I didn't like about the state because a short list is easier than the long list of things I like.
1) No beaches. This may or may not be a problem for you but lack of a nearby ocean is a deal-breaker for me.
3) If you like to play in the area's waterways, don't try to pick up the turtles, Those freaking things are savage man-eaters.
4) Because of the temperature extremes, houses expand and contract. Your drywall will crack at the joints and there's really not much you can do about it.
That's the end of the list. As you can tell, ND is a horrific place.
There's a lot of wind out there so caution while driving on the ice is advised. I've seen a lot of trucks literally pushed off the road. Cars don't present the same profile so they don't seem to have a problem. Semis are heavy and stay planted but pickups and vans, because they are actually very light for their size, tend to get pushed around by the wind easier.
If you have trouble on the road, someone will stop and save your butt shortly. Don't forget to return the favor when you see someone else having trouble.
You may find it a bit of a culture shock to be surrounded by humans behaving like humans but you'll get used to it. It is cold in winter but generally sunny. Somehow, a sunny -20 day in ND feels much warmer than a gloomy and foggy 65 day in San Francisco.