depends on my mood when im in the liquor store. i dont keep lots of booze around and dont usually buy more than 1 or 2 types of rum when i get any.
i like spiced, and plain dark rum and coke. i like vanilla rum and coke. banana rum is decent in some coke or apple juice. citron (which is, i think, rum, tequila and lime juice) is good in coke, white rum is, indeed, good in dr pepper and a couple of other things...
all depends on my mood, last i had was cruzan dark rum with coke, which was tasty, ill probably get spiced or private stock next time, however.