When I was anywhere down south and even in Texas, all I heard in reference to soda, was it was called "pop." But, Dr. Pepper was always called by name.
In this part of NC we call all of them drinks. Like, "I'ma run down to the store and get me a drink. Y'all want one while I'ma going?" "Yeah." "What kind you want?" "Brang me a Pepsi." And a pack of Nabs, too, while you're going."
The last time I was in Texas was 50 years ago. The Hill Country and East Texas were a bit different in words and accents than say far west like El Paso. Texas is a big state.
Pastie territory, have not had a real pasty since I left Michigan when I was 17, lived in PA for a while, coal country, they had something similar to a pasty it was a regional thing made for coal crackers lunch boxes not even close to the UP pasty taste.
I love accents. I find them to be very interesting, and they can be very different here where I live. I find they seem to be different even in our family who have all grown up within a few miles of each other. There might be a mild accent or a very deep drawl. I grew up in the midwest, so I have a midwestern accent. My son lives here, and he sounds the same as I do. My daughter-in-law grew up here in the south, and she sounds the same as us. I've wondered if she has picked up his way of talking, but I think she has always spoken this way. Many people here have the traditional southern accents, my southern family members included. The family has varying degrees, and it's very interesting, although I don't know the reasoning. I'm really unsure what causes the difference.
To a certain extent, I sometimes lapse into my NJ/NY accent with certain words. Otherwise no, I don't really have an accent at all.
I grew up in a mountainous part of Idaho, then spent a total of 6 years in Austria, then my 52 year teaching career in Louisiana and Florida. I had no problem learning "Southern," because several of the fathers of the families in the small town of my childhood had been CCC workers from southern states and stayed there. My best friend's dad went by "Alabam."
I've always been fascinated that people can adopt the accent of the region in which they currently reside, but get them to talk about "back home," and they will lapse into their accent-of-origin as in their mind's eye they are there. I specifically recall one woman I worked with in Virginia, and when she started talking about "home," she slid into a New York accent.
I have had someone guess, correctly, that I was from either Michigan or Wisconsin (born in Wisconsin, grew up a few miles away, in Michigan), but that I also had a slight Spanish accent, which had to have come from the twenty years I lived in the Rio Grande Valley of Texas. No one has ever accused me of having a California accent, however.