Although I despise TX BBQ I do agree that Terminal D has the best food options but Termina A AC is still my favorite. I love the Reata and Cool River is ok. There's just SO many people in the Term D AC and the smoking area is very smoky where as the one in A has better air ventilation. It seems like it's always the same people in A as well so it feels more familar and cozy.
I have recently found out about the Wine tasting room thing in Termal D so that is goign to be my stop next time I'm through DFW
Look here for others who like DFA A AC - Celebrity Spotting