I've been mostly out of the area for the last 5 years (long story about the "mostly"), and now I'm trying to build up a list of reliable non-fancy Mexican joints near our house--say roughly between 32nd St and I-17 and from MacDowell up to Bethany Home.
Our current defaults are La Barquita (south side of MacDowell just west of 24th St) and Tacos Mexico (east side of 16th St, near Oak). We also like Pepe's Taco Villa on Camelback (near 23rd Ave), but don't end up going there as often as the other two places.
Just thought I'd poll the board to get your picks for places where the food is great, even if the ambiance is a little on the funky side. Bonus points for places with housemade corn tortillas and rellenos that don't taste like year-old fryer oil.