Depends on the style. If you want something more dependable and 'California' then El Pelon, Tenoch or Esquite should hit the mark.

Teresa's Market in Brighton is also stellar.

Otherwise, if you want something a little more classic - then Cactus Grill, Taqueria Don Rogue (food truck in Everett), and Taqueria Jalisco won't disappoint.

Honestly, I've been getting my burritos from Rincon Salvadoreno - a little hole-in-the-wall. They're a little basic, but really good bang for your buck and pretty damn yummy. Angela's is awesome, though it's a traditional Puebla-style restaurant, so you should sit down and order anything else. You won't regret it.

Super Burritos is a fun wildcard - you never know if it'll be good! But if it's good, it's fuckin' great.