I lived in San Diego 38 years. The locals often say "don't trust anyone that doesn't like Mexican food". There's some truth to that statement. Good Mexican really is irresistible.
I like nearly every Mexican dish. But my favorite is fish tacos. Baja style (beer-battered) or Sonoran grilled. Both are excellent. And in the case of grilled fish, quite healthy. Add black beans and rice for sides. Bahia Don Bravo in La Jolla and Brigantine Del Mar are top spots.