I love this stuff. I use a lot of mid-western/southern isms, while my wife uses a lot of Michigan isms. My wife also does that yes/no thing. She'll say things like, "are you going to Krogers to pick up some Hamburg?"...to which I'll reply," I'm going to one Kroger to get some hamburger". Then she'll ask if I'm going to get buns, to which I answer "yes"; then she'll say "no?" 99% of the time.
I drive her and a lot of other people crazy by saying 'probably' or 'more than likely', when I mean absolutely yes. I'm not sure where that comes from....rural anywhere, more than likely.