Bourbon: 1792, Woodford Reserve, 4 Roses, or Elijah Craig 12 year.
Scotch: Dalwhinnie 16 year, Macullan 18 year (too damn expensive though), or Old Pultaney for cheap single malt.
My scotch is normally done clean, with a squirt of water. Bourbon is usually over ice, sometimes with a diet Coke...