Burritos don't suck, but they're pretty mid.

Corn tacos loaded with veggies from the salsa bar are where it's at. Corn tortillas are high in fiber, whole grain, and way more delicious than flour tortillas imo (and they're probably freshly made). Throw on some pickled peppers, shredded lettuce, an interesting salsa, and some pico de gallo or something and it's probably healthier than most salads you'll get at "Mexican" places.