If I lived in west Texas, New Mexico, Arizona, Nevada, desert camo might make sense. But I don't, so I never considered desert tan or desert camo.
I have two AR's in OD, and that blends well where I live.
I had an Armalite that I had ordered for one of my son's, and it came in to the dealer with a factory camo job, RealTree. We called the distributor and he said he was out of the regular black, sent that at no additional charge. Well, it looked tacky.
My son was not thrilled either. We sold it, and I bought him a DPMS lower and a cherry picked some parts, and let him assemble it with a little guidance. This was probably the best thing to do anyway.
Later the guy I sold the camo Armalite to had me disassemble and strip the camo off.
I don't mind woodland or tigerstrip, but RealTree is just... strange.
Edited to add: I am familiar with the area around Dallas, have been through there many times. Solid OD or Woodland would work well for you, such as the finish in Cowboy's picture farther down this thread.
Here's one of mine in OD: