Well, since someone else has revived this thread, I'll chime in.
1. ***** Modelo is actually an Austrian style that has since died out elsewhere in the world. It was brought there by immigrants fleeing WWI (the Mexican immigration scene has not always been what it is today). There's a handy Cliff Clavenism to let anyone at a party instantly know you are beer nerd.
2. The Skunk in Corona and others in the clear bottles is actually quite low, due primarily to the bare minimal use of hops. If anything, it think they are too sweet, which is the only reason I personally use limes if I am drinking them.
3. One of the better microbrew festivals is held in Tijuanna in November. You have most of the usual suspects that you see at the US festivals, plus a increased showing of the big Mexican breweries and a handful of Mexican craftbrewers. The bitchin' part is that it is only like $20 for admission (10 or so tastes) and then $2 pints until you can no longer stand.
4. To the OP, what are you doing ordering Mexican north of LA? I guess Sac may have some decent stuff, but that's just a general rule of mine.