I don't partake often, but when I do, it's likely to be the heavy smokey/peaty ones, especially the Islay ones. I like smokey teas, I like smoked salmon, I like smokey whiskies.
If I had to choose a second-favorite style, I'd probably go with Canadian rye. I keep some bourbon on hand but, with the exception of the one noted below, use it as much in cooking and baking as for drinking.
I had the opportunity to try several Indian whiskies several years ago when a colleague brought quite the variety back from India. Quality varied, I'm sure they weren't all intended for export, but some were rather good.
Most unique one I'd recommend? Probably hard to find, but it would be Ty Iechyd Da Hinterland. Bourbon whiskey finished in maple syrup barrels. Everything is better if made in maple syrup barrels, and bourbon is no exception.