I'm German so, hell yeah, beer! Brand doesn't matter as long as it is brewed after the German purity law.
I also really like Rum-Cola; Cranberry juce and Vodka is also good, but I have some baad memories from it, or to be exact no memories if you know what I mean;-)
Moreover I really love Long Island Icetea
In a long drink glass: 2cl Tequila, 2cl brown Rum, 2cl Vodka, 2cl Gin, 2cl Cointreau, 3cl citrus juce, 2cl orange juce, and fill up with coke;
awesome
but dont drink too much to fast, the different liquor takes hold delayed to each other.