A walk down the aisles of almost any neighborhood liquor store showcases a wealth of variety that hardly seemed possible when I made my first legal purchase [mumble-mumble] years ago. You'll see 50 bourbons where there used to be five, vodkas from as far and wide as Russia's Stoli to Tito's from Texas. If you'd have told 21-year-old me that someday I'd enjoy scotch from Japan, I'd have looked at you like you were a crazy person. You'll find, as General Motors used to say about its array of cars, a spirit "for every purse and purpose." Things are already...