Would say most southerners sound funny?

I say ” yall ” a lot. And sometimes I laugh at my own voice…. But I went to California ( Santa cruz) a few years ago to visit family. While there, I was looking for the wonderful invention of phone cards. So, we made a pit stop at the nearest grocery store. I went to a checkout lane, and politely asked an employee, ” excuse me, do yall have any phone cards?”. The associate looked at me as if I’d asked him to pick my nose- and replied(almost mockingly), ” are you from TX?”. Without missin a beat, I said ” no, AR. ”
I love it