I'm with JohnnyMac, I love Islay whiskies especially Laphroaig, Lagavulin and Ardbeg.
I've also become fond of a few bourbons, Evan Williams (ahh.. a good Welsh name if ever there was one) is pretty good, and my favourite Japanese whisky is Hakushu made by Suntory. It's got as much character and complexity as a good Scottish single malt but with a slightly different twist.
IMO any other Japanese whisky needs to be drowned in water to make it drinkable.