I fly mostly DELTA ex-DFW and have been doing for years now and am very happy with the arrangement.
If I am going East, I will always check DELTA First, west I tend to split between DL and AA.
The SkyClub is good and the staff (both at the SkyClub and the gate) is top notch, I have watched one Gentleman in particular handle rather sticky situations with grace that impressed me enough to write into DELTA to them about him.
Fairly busy commuter station as well, I routinely see the same DELTA pilots and Flight Attendants listing for flights to ATL (mostly).