I've never found my favorite, it seems unless you the resaraunt is just terrible, they become my favorite for a little bit, then I eat to much of it and blow out.
It happened with Chango's and Torchy's when I worked on the drag.
It's not a traditional taco joint, but the food is fantastic and very unique. Make sure to take a look at the Taco of the Month since they typically don't show up again and are usually amazing.
Ken's Taco's on Cameron Road, just north of Rundberg!!! The place is always packed, but it's not that well known, unless you're local. Other thatn that, I would second JIAM!