Kevin Nash says Hall isn't suffering from addiction, but PTSD. I figure that means he was abused as a child, sexually or physically.

You are correct though. If things were a little different, and say Nash and Micheals left for WCW, Hall woulda been a multiple time world champ. He was the only one Austin wanted to work with when the NWO showed up in WWE, because when he's sober, he's the only good worker of the bunch.