I am amazed that there is this lengthy discussion on the use of "mines." It started to bother me a few years ago when African-American colleagues/co-workers used it so blithely and often. Good to know it bothers others also. I teach English for Speakers of Other Languages (ESOL) to foreign adults, and I would hate to have them learn that version of "mine" or "my." In my experience, it is mostly non-college educated African-Americans who use it. My college and grad school buddies who happen to be black NEVER use "mines," at least not when I have been present. "Ax" instead of "ask" is also annoying, but "mines" takes the cake. And yes, we have too much time on our hands.