Texas is like Florida....it's the South, but the feeling will differ depending on where you are in the state.
Florida - the more north you go, the more stereotypically southern it gets. Go south and it's a bunch of snowbirds. Further south and it's the North Caribbean. All the snowbirds, Haitians and Cubans give it a different flavor but that humidity alone is Southern as fukk.
Texas - east of I-45 is the South. Houston, Marshall, Tyler, Beaumont, Port Arthur.....Vidor.....that's southern as fukk. Only difference is Houston is wayyyyy more international than any Southern city, ATL and Miami included.
Austin is diet Texas. Most easily consumable for out-of-state white liberals.
San Antonio down to RGV is North Mexico. Far west Texas to El Paso is basically the Ciudad Juarez-El Paso Metropolitan area plus a bunch of mountains and cactus.
Panhandle is like Oklahoma/Kansas/Nebraska.
Dallas....the border between the South and the Great Plains and the West.