OK, good luck with those hard to express “perspectives”. People are so transient in this country now that hopefully some of the old stereotypes will one day melt away.
They are not hard to express, they are complex and time consuming, and I have other things to do with my day. Southern agrarians generally, and M. E. Bradford in particular cover many of the particularities if you are actually interested.
Your desire for regional distinctions “melting away” will be frustrated I fear. Present trends in this nation indicate precisely the opposite absent the (re)application of brute force, and examples in other nations argue that distinctive cultures tend to re-emerge - even when brute force is attempted.
The Austro-Hungarian Empire is again Austria and Hungary, Czechoslovakia is once more Czech and Slovak. East and West Germany did merge, which could be offered in support of the utopian’s dream of collective unity, but in the context of them reuniting -as distinct- from their neighbors, it reinforces the primacy of local custom, culture and language.
Right now, the United States appears to be on a trajectory like the Soviet Union of the late 1980s. We shall see.
In the end, it is all Ozymandias, and peoples survive longer than polities.