Well now, I can't let this discussion get away without mention of a couple favorite, if not great, eateries of mine.
There is a taco wagon – for you eastcoasters, a "taco wagon" is a roach coach on four wheels, sometimes an old school bus, that serves Mexican food. Of particular note are the tacos for a buck each – two steamed 6" corn tortillas with chopped onions, cilantro and your choice of chorizo (sausage), adobada (spicy pork), carne asada (beef), pollo (chicken), etc. Squeeze some fresh lime on top and we're talking absoluto perfecto mundo.
The best wagon is just after you come out of the Reformatory Hole on the Skykomish River. Another great one is off I-5 next door to the Mickey Dee's in Burlington on the way home from the Skagit. I've also stopped at the one in Ellensburg on the way home from the Yakima River and shared a six pack of Coronas with the proprietors on Cinco de Mayo in order to guarantee a clean table the next time I stop by.