I got to thinking about this and there have only been two places I even remember how good their tacos were, and that is Alvarado's Mexican Food in benbrook, TX and Taco Casa in Stephenville Tx

Alvarado's also have some incredible roasted chili salsas on a cold bar at the end of the counter.

the have some mean chicken taco's as well, it is the real deal, a perfectly seasoned shredded chicken.