If straight - Whiskey, preferably Gentleman Jack or Crown Royal. If mixed - Vodka, preferably Absolut or Skyy, although there are plenty of fine vodkas out there that all mix well. Whiskey goes best with dark drinks. Coke, Dr. Pepper, and the like. Stay away from
Root Beer here if possible. Vodka is best with citrus, although it can mix with nearly anything. Sprite is a surefire bet, ...