I have lived in all four corners of this huge country. My observations, although probably not completely objective are as follows:

Midwesterners or Easterners generally think the folks in the south are slow witted because they talk funny. Southerners generally think everyone from the rest of the country (generally referred to as Yankees) are not to be trusted because they talk funny, as well as share their opinions on how much better things were back in New Jersey, Minnesota or wherever.

Californians are a very different breed of cat. They somehow think that they are on the cutting edge of everything but in reality are in ways behind the rest of the country. Malls closed at 6 0'clock in the evenings on weekends when I was there and they hadn't managed after hour banking or lots of things that were the norm in the east. (this was in the 80s so I imagine they have changed, but I still know people from there and they have a mindset that pretty much everything begins and ends in southern California.

The east coast from Washington DC to BOston is largely one big urban area. I think the nicest most genuine, but in-your-face folks in AMerica live in that corridor.

America does seem to have some tribalism issues, though. If you live in any state in the midwest, you tend to only want to live in your state...forever...until you move to Florida when you retire. If you live in the south, anyplace is fine,,, as long as it is in Dixie. Californians can only live there...forever... because they can't find organically grown sprouts and yoga instructors anywhere else. Well, this should clear it all up for you.