Taco Casa at 2898 West Washington Street, Stephenville, Texas.

The prices can't be beat and they are extremely generous with portions. The only negative thing I have to say at all is that the crunchy tacos are hit or miss if you get them to go. Sometimes they're fine, but just as often they are dripping with so much grease that it leaks out of the wrapper and soaks through the bottom of the (paper) bag. This isn't an exaggeration at all. Still, it's my favorite place by far for Mexican fast food because of the service and portion sizes.