I left S.F. 4 years ago for the woods of Marin and love it but continually find myself back in S.F. for dinners when I want to enjoy good food in an environment with a fun vibe at a price that feels justified (with the one exception of Taco Joe's in Mill Valley). I find the Marin restaurants stuffy and overpriced with uneventful food. Are there people out there who have found some gems?