No chicken express here yet. Anyway since we are talking about food places. Steak and shake has good shakes, and chilli in my humble opinion. Brings me to childhood every time I go there. I found some decent places (local chains) here in San Antonio. If you ever get a chance to come here, please check out these guys. They're affordable and for your money, worth it. Yes, there are some really good stuff out there as well, but these are more affordable. Bill Miller's BBQ, a good selection and won't break the bank. There are two Mexican chains that are also good, Las Palapas and Taco Cabana, some very good budget friendly Mexican food. I got some other great restaurants here, but for what you paying, very good stuff.
Taco Cabana is all over Houston too. In my wilder days, this was the goto place at 2am when the bars closed down. (its 24 hours)
Not GREAT Tex-Mex, but a significant step up from fast food.