Bourbon: If we're talking sheer volume consumed, then by far it's Mr. Beam. But if we're talking pleasure of Consumption, it's Evan Williams and Elmer T.
Scotch: Macallan 12 year. I've had the 15, 18, and a bunch of the Canadian and European varieties that don't have a year on them. Not rich enough for the 25. The 12, with its mellow flavor and buttery texture is my favorite. This one wins by volume and flavor.
Beer: Tough one. By volume, three way tie between Fat Tire, Erdinger Hefeweisen, und Yuengling. By flavor, I have no idea. I just love beer. But German and, to a lesser extent, Belgians are my favorites. I also really like stouts. The Guinness we get here in the US, and so are most stouts that aren't "imperials," but you know a good stout when you get one because you don't want anything else. I really like beer.