They're very interesting, at least to me. I was born in South Dakota several years ago. Since then I've lived and worked all over the US.
I spent 6 years in Oklahoma during my late Elementary and Junior High School days. Then moved to Idaho for High School. Since then I've lived and worked from Northern New York State to Hawaii and LOTS of places in between.
I found it very interesting that when I traveled on business to Texas, Alabama, etc., it took me about half a day to "reacquire" my southern (Oklahoma) accent.
The natural Idaho accent is almost exactly the same as Georgia! Idaho was settled during the "late unpleasantness" between the North and South during the 1860s. In fact, Gold was discovered just a few miles north of Boise in 1862 and the resulting mining activity pretty much financed that "unpleasantness" for the North.
And South Dakota is another story altogether! A LOT of Scandinavian (Norwegian and Swede) influence, and boy do they talk fast!!
A very interesting collection of local sounds. And then we get to consider our Australian and New Zealand friends, not to mention the source, Great Britain.
I just hope my Grandchildren aren't forced to learn Arabic, and live under Sharia law!