I used to be a bartender. I've heard literally thousands of stories and anecdotes on why you should avoid "rot gut" liquor. When mixed with anything (especially soda), the taste of alcohol is killed to a large extent, and it becomes difficult to detect the subtle qualities of expensive liquor. I drink the cheapest vodka (Kamchatka Vodka) about twice a week, and have never had any worse of a hangover than when I drink Absolute, Grey Goose, or Sky. Am I a freak of nature, or are there others who share my refusal to pay more for the same buzz with the same hangover?