I'll have to stop in at the Gingerman next trip. We mostly played in the clubs in the NE part of town, a few inside the loop. Ever been to Lyin' Larry's?
Speaking of watery beer, I wouldn't touch a light beer of any stripe. My all-time favorite is Shiner Bock, which may be a tad lighter than Moose Head or Sam Adams, but not by much. I used to favor a French beer I found when my wife and I went to Paris in '95, Kronenbourg, but I can't find it around here anymore.
Kronenbourg is available in one-liter "mini-kegs" (a big can), that are handy as "boat-beers". I used to by them by the case in Charleston when I lived in SC. Unfortunately, one case I bought was completely uncarbonated....turned me off to Kronenbourg.
I never could develop a taste for Shiner Bock. A much better one is Paulaner Salvator (pronounced sal-VAH-tor), which may not be available in Texas, although I think I remember seeing it at the Gingerman. It's definitely worth hunting up. Ayinger also makes a good bock. For a great Doppelbock, try Samichlaus (brewed by Hurliman of Switzerland) (again, your best bet is probably the Gingerman). There is a Gingerman in Austin, too.