"Potato, so dense and heavy, is the complete opposite of wheat. A potato vodka is very much about texture. Think about mashed potatoes, the feel of potatoes in the mouth. A good potato vodka will be very voluptuous, very full. However, potato is notoriously difficult to use as a base ingredient because it releases quite a lot of impurities during the distillation process. Good potato vodka is hard to come by, but if you find one, it's a treasure."
[Ed. Note—Tito's, based in Austin, Texas, is a very smooth potato vodka.]