(1) Pancheros on Welch, circa 1997 (pre-"corporate")
The "El Gordo"
THIS. This was the burrito of choice to hit up on a night after hitting Campustown bars and chew on it all night. It was also the first place to really get me into burritos. I hit the Pancheros in IC shortly after 97 and was disappointed how it didn't compare to the one in Ames.
Now my favorite burrito is the Burrito Ahogado, found at Lupita's El Super Burrito in Cedar Rapids.