I like Painkillers* (mixed rum) and Tullamore Dew (whiskey). There's also Kamikaze's, soko & lime, and surfer on acid (all shots).
*Painkiller
4 oz pineapple juice
2 oz Pusser's dark rum
1 oz cream of coconut
1 oz orange juice
Shake or stir ingredients, and pour over ice in a tall glass. Sprinkle nutmeg on top, and serve.