Big fuzzy's fan here but Ernesto's Tacos on McCart in Ft. Worth is also another great place. They have authentic mexican street tacos that are basically made with 2 corn tortillas, meat, cilantro and onion. Sounds kinda plain but the meat in Ernesto's Tacos is just outstanding. (the chipotle chicken is amazing) If you're in the area give em' a try - you won't be disappointed.

The best breakfast burrito I have ever eaten, by far, is at JC's
Burritos on West 19th in Lubbock. Austin, of course, is full of unique taquerias-Maria's is certainly a keeper, and the original Chuy's calls Austin home. My favorite tacos ever, though, came from Santos' taqueria in Mason-wonderful and somehow a little magical. You can get sangria on ice with a little slice of lime and a cherry, have some homemade chips and salsa, then fish the Llano the next morning. Almost paradise.