Spaten is good stuff, and if you can find it, Baltika #9 is pretty badass, 8% but doesn't taste like syrup. Becks is alright, Shiner (Texas area) is pretty good. Belhaven and Boddington's are a couple good dark ones, great with sausage/potatoes kind of meals or pizza even. Sapporo and Tsingtao are always worth a try as well. Of the popular Mexican beers only Dos Equis stands out as genuinely pretty good, Corona/Tecate are only survivable with a lime, which is fail imho. Tequila is why Mexico is awesome.
For some reason I really don't like Pale Ales or most light beers. Most US beers are borderline terrible outside of the microbrews / local brews.