Single malt and blended Scotch, Irish whiskey, Japanese whisky, and the Australian and Indian distillers now making some of the most interesting whisky in the world. Islay peat from Lagavulin and Laphroaig, Speyside from Aberlour and Glenfiddich, Suntory's Yamazaki and Hakushu, Lark from Tasmania and Starward from Melbourne, and Amrut, Rampur and Indri from India.
If you are starting out, a Speyside or an Irish whiskey is the gentler way in; Islay is the one people either love immediately or never. Every bottle lists its region, producer and ABV, so you can tell what you are getting before you buy.
To narrow it down, there are separate pages for Scotch whisky, Japanese whisky, single malt and bourbon and Tennessee whiskey.