Never been to El Paso. If one is not about the humidity, I would stay away from Houston. Dallas area is not so good either. The Panhandle is really dry...Amarillo. Having lived in all of these areas, I would not want to live anywhere but Texas. Having said that, there are lots of places to choose from. You want a beach, like Basil said, go to Galveston.
Been to Dallas for business quite a bit, inadvertently took a tour of Grapevine several times due to confusing construction detours around I=35 outside DFW. Grapevine seems nice, well kept old downtown section that looks prosperous, probably a popular suburb, especially with that large lake, reservoir or whatever on the other side of town. Dallas proper doesn’t do it for me, at least the parts I’ve seen, but it does have a booming economy in it’s favor and excellent connections by air.