I still am in disbelief at how good all the food was in El DF. I had extremely high expectations, and they were surpassed by far.
Salon Corona, a very busy cantina with huge mugs of beer, tortas, tacos, etc. and of course, mariachi. Lots of fun with tasty, solid food.
Panaderia y Pasteleria Vasconia, in Centro: they have a rosticeria there too, we had great roasted chicken sitting in the middle of the piles of pastries (and flan for dessert!)
Tortas El Cuadrilatero on Luis Moya in Centro - good tortas, great spot decorated with lucha libre masks
Misc: La Europea liquor store in Centro has a ridiculous selection of hard-to-find tequilas and rums for incredibly reasonable prices.
Breakfast: Cafe la Habana is fantastico. Unchanged since 1953, old-school espresso machines, great chilaquiles and huevos motulenos, and of course the coffee is awesome.
Pozole in the Mercado Jamaica
Quesadillas and gorditas at the Mercado de Antojitos in Coyoacan (behind La Guadelupana, just off the main plaza flor de calabaza, huitlacoche, picadillo,
Tostadas at Tostadas Coyoacan, in the Coyoacan main mercado (amazing variety and size of toppings on offer)
Blue corn huaraches at stands near the Palacio Postal
Roaming sweet potato vendors, anywhere you can find them
Fresh juices, also anywhere you can find them (orange, pineapple, grapefruit...)
Roasted elote (corn on the cob) anywhere you can find it
Tacos Alvaro Obregon in Colonia Roma - great al pastor, and everything else
Casual tacos/quesadillas inside San Angel's Bazar al Sabado
Capuchimoka fria at Cafe El Jarocho in Coyoacan (we also bought some beans to bring home, which are awesome)
Good places for drinks (adequate food, but more for the atmosphere):
Bar La Opera, in Centro
Hacienda de los Morales
San Angel Inn
Aguila y Sol. Swoon - simply cannot say enough about this place. Impeccable service, lovely presentation, large portions, nice 'extras', and every single thing we put into our mouths was incredible. 2 appetizers, 2 to-die-for entrees (duck and beef filet), one margarita, 3 glasses of wine, one dessert, one 'fiery hot chocolate', plus a generous tip = $129 US. Quite possibly the best meal I have ever eaten, and certainly at that price point.
Pujol - also very delicious, and we'd be splitting hairs here, but not QUITE as spectacular as A&S. Focus on presentation, smaller portions, no accompaniments to the entrees, and a lot of foam. Interesting and delicious.
Disappointed in the options on the strip in Condesa.
Didn't make it to La Rauxa or UNAM - next time...