Having lived all over the south, I understand where you are coming from, but I do want to say that people are a LOT different in terms of mentality. Alabama and Mississippi are not that much different, but there is more racial tension and subsequent sideways looks in some parts of Mississippi (the Delta in particular). There are some differences, but it is difficult to put a finger on...almost more of a haughtiness in MS, and aggression in Alabama...as I said, hard to explain. Most Mississippi companies are owned by local interests...I think that contributes some...and there is more of a "chip on the shoulder" aspect.
Kentucky is very regional...Northern KY is kind of cold - not mean or hateful...just a lack of interest in others. Southern and Eastern KY tend to be more Appalachian in mindset - wary of outsiders and slow to build trust and relationships. Arkansas can be that way in parts as well, but much of the state has external influence due to outside companies, so there is an interesting dialectic.
Georgia is vastly different between the north and south - and the central area is its own creature. Atlanta is a very cosmopolitan city.
Interestingly, I find Missouri to be the most "Alabama-like" of all the states I have lived in - at least in the case of the Springfield area. The people here have similar attitudes and interests.