Corona may be the best selling Mexican beer, it is not the best selling beer in Mexico, as bought and drank in Mexico. Hell, it isn't even the top selling beer from their own brewery (Grupo Modelo.) Modelo Especial has that honor. Corona is either fourth or fifth in domestic sales, depending on your source.
You can usually tell who your fellow tourists are while in Mexico. Look around, and you notice all the Gringo's are drinking Corona, or possibly a Dos Equis (amber). At least with Dos Equis you can ask for the green bottle - the
good stuff. With Corona, there is no good stuff, unless of course, its free
There are really only two breweries in Mexico, as after the top two, the next ten don't sell as much as either Cerveceria Cuahtemoc Moctezuma or Grupo Modelo. The older of the two, Cerveceria Cuahtemoc Moctezuma makes Two XX and Sol, amongst others, while Grupo Modelo makes Corona and Pacifico, amongst others.
I've tried it, and though I prefer it to Corona, it loses a little of its mystery because you can buy it in every carry-out / gas station in the city. My wife and I will split a six of Tecate or Dos Equis or WhateverMexicanBeer every 3 or 4 weeks.
As long as I'm rambling about Mexican beers, has anyone tried the Negra Modelo? It is too thick for my tastes - almost chewy thick (figuratively speaking,) maybe similar in texture to a Stout. Not what you'd expect from a "Mexican" beer (am I stereotyping?) But it doesn't have the same flavor as a Stout, just the molasses feel about it.