Can't drink bourbon or real rye whiskey due to a taste aversion from the side effects of an over-indulgence back in college (almost 40 years ago!). I generally drink Sapphire or Boodle's martinis (without vermouth, so it's really chilled gin) or any variety of Bushmill's with water and no ice. Also, premium vodka martinis (Absolut, Grey Goose, etc.) will work fine for me. I used to drink a lot of Scotch, but somehow over the years Irish has tended to take its place.
For a change of pace, I also like some of the amber rums, particularly Appleton's from Jamaica, with water and no ice.