Maybe it's my honest face or just being an old fogy, but I've never had any problem with the TSA. Although I don't fly as frequently as I did in my working days, I still pass through D/FW rather frequently -- mostly on American -- and have never encountered a hassle. As much as I loathe hussien's TSA, most of the agents here are friendly and courteous. Must be a Southern thing is all I can imagine.
Chicago and LA are notorious for this aggressive screening of people who pose no threat.