Do you not consider Kentucky or West Virginia to be southern?
From the Georgian perspective:
And Barrow's gone. But in gutting Barrow like they did, they've opened Kingston up to some future vulnerability. Kingston's in a district where Republicans are now just a little less than 55% of the voting bloc. A good candidate could take the seat. Coastal Georgia's Republicans are more moderate, northern types. The interior is all Dixie, though.
I can assure you that, having been to all three, North Florida/FL Panhandle is at least as southern as, say, Tennessee or Kentucky. The South ends at around I-4; north of that, it's definitely South at least, possibly Deep, and south of that, it's really not.
There are pockets of the North- Gainesville which is about 15 min east of my house (I am just east of Newberry) is very liberal due to the school over there. Trenton (about 30 min west of me) is as rural and conservative as it gets- one traffic light in the whole county
But you're right that North Florida is mostly very culturally Southern