Hmm...my favorite Mexican food....
Here where I am now, my current favorite Mexican place is called El Real in Lawrenceville, GA. Super good food and authentic recipes. They have conchinita pibil and molcajetes on the menu that remind me of things I've had while in Mexico. Plus - it's the only place I've ever been where beer and margaritas come in small, medium and large sizes.
Favorite Mexican food overall was a restaurant in Monterrey, Mexico called la Valentina. There were a lot of interesting things on the menu there and everything was delicious. Eating dinner at 10:00 PM was an adjustment, though.
My favorite breakfast burrito was from a little teeny hole in the wall place in Holtville, CA. I think it was called The Taco Shop, but I'm not sure (it's been almost 20 years), but at the time it was a little blue building on a corner on the main drag through town and just down the block from a big citrus shed. The breakfast burrito was huge and probably weighed at least two pounds - and totally crammed full of sausage, eggs, potatoes and cheese. I wonder if that place is still there.