I love Dominos for delivery. Since they changed their crust I love them more, I used to hate them.
However, my favorite, favorite FAVORITE pizza place is Palio's Pizza. It's a small chain mostly in north Texas and a few locations in Houston. It's a small Italian cafe that has fresh ingredients, made on the spot, does delivery. Love it.
Also, I worked at one in DFW for over a year. I was sad to leave it because it was the best, most stable job I've ever had, but I was moving and had to. I know I'll always have a place to go back to if I move back to the area.