Gin: Bluecoat, Citadelle. Though The Botanist sounds amazing. I prefer herbal gins to dry gins quite a bit.
Rum: I like El Dorado and Dos Maderas, anything over 10 years.
Bourbon: Bulleit. Buffalo Trace is okay.
Vodka: It doesn't really matter because good vodka has no taste (and neither do you, you vodka drinker) but you should get Tito's. AVOID Grey Goose, Belvedere, and other "super-premium" brands - you are buying a label.
If you want to be a SUPER BALLER pick up some ROOT, SNAP, or RHUBY:
http://www.artintheage.com/our-spirits/Other things I enjoy keeping on-hand:
- tonic water and soda water (at least until I got my iSi)
- NAVAN (vanilla liqueur, mixes with anything)
- American Honey or equivalent (super-sweet bourbon liqueur, good for mixing or shots)
- sweet tea vodka (Firefly or equivalent)
- a good non-Kahlua coffee liqueur
- a good non-Bailey's Irish Cream
- orange liqueur (Grand Marnier or equivalent)
- a bottle of Johnny Walker Black for friends afraid of sweet drinks
Also keep on hand: lemons (or lemon juice), limes (or lime juice), oranges, maraschino cherries.