Oyamel = overpriced mexican style. Chips with cheese for 8 bucks? A taco described as "Stew of shredded Shenandoah Valley pork with chorizo, chipotle, lettuce and avocado", 4 bucks each?
Heck, if that's what you want, more power to you.
BTW, you do know that there aren't that many mexicans in DC? according to one online source, the most in any zipcode is under 4%. Salvadorans are the bulk of our latino population, which is why there are some pretty good, affordable salvadoran places in the area, but no good mexican.