Corona -- the standard!
I've had some really nice beer from Lagunitas; the Cappuccino Stout sticks out in memory, even after months.
I used to be a big fan of Hacker-Pschorr Octoberfest, but their Wiezen is good too. There are a bunch of great German white-beers; a good relatively cheap one is Hoegaarden witbier
There are plenty of great Octoberfests, woo-hoo! Even the Paulaner is pretty darn good, and has little sample variation.
When the Ga. beer laws changed, I went through a phase of trying all the strongest beers, like Kulminator Doppelbock
Which reminds me, while all of the Doppelbocks are pretty worth trying. A really good regular bock is Aass Bock, from Norway.
Lately it's been Tequiza (great with taco chips and lime.)
At a party the other night, a friend and I bought several different chocolate double stouts -- they were all great, and we really liked Young's. (if you like heavy beer syrup, which I do: try some Mackeson[sp?] stout; it's not quite as sweet though.)
Special mentions for Delirium Tremens (with the flying pink pigs), and Negra-Modelo Dark; St. Peter's Cream stout <-- that's some great stout, not too heavy.
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