Maryland is the most confusing one.
Some of appalachia isn’t consistent with the rest of the south.
I like some of California, but hate the rest of it. I like Orange County and I am fine with Marin. I hate San Francisco and Los Angeles.
I am considering Northern Virginia the south based on the history of the area and it’s strong former ties to the confederacy.
I’m considering rural southern Maryland southern. People there are super laid back and friendly compared to the rest of the state.
Texas is too large to be all part of the south.