Well sometimes they come in on 17C/35C or 18R/36L. and the good cantage point to take photos of it comming in 17C/35C is at Founders Plaza, and then on the West Side I would suggest to go to the Cargo Megaport and jsut get up to the gate. Also you can see a lot of aircraft in the AA hangar(one of them atleast).
"If I have seen farther than others, it's because I was Standing On The Shoulder Of Giants."
(hope this helps ya, and Welcome to Dalls/Ft. Worth, have a LUVly stay!!)