I have to say my favorite rum is by far Appleton's. I have found it here in the states but for some reason it just tastes a little better in Jamaica. In Jamaica you can also find the "overproof" white rum, which is not available in the states. That is some white lightning!
Can't go wrong with the Appleton's of any variety.
Huge fan of Jamaican Rum!! Appleton's is great. Incidentally Wray and Nephew Overproof is available in the states, although you have to look around to find it. I get it regularly at a specialty foods and wine store near my location. My top three for sipping straight or with one ice cube:
1. Edwin Charley Virtue Select Single Barrell - Wow!
2. Gosling Black Seal - Bermuda, sugar cane, British trade, etc. and its $15 bucks for a fifth!
3. Appleton Estate 21 Year - Yum...just yum.