Ah, a topic close to my heart! Costco has Lagavulin 16 on sale, or at least they did last week... Bottle's still half full! Hard to be pesimistic with a well aged, Islay single malt so close at hand.
If'n you've never tried an Islay single malt you may want to start with a Laphroaig 10yo with a splash of distilled water.
That's what got me really hooked on whisky though. I was curious to see if there was really something to all the flamboyant and over the top tasting notes that you see everywhere and bought 10 bottles of different scotches to figure out if the deal is real. It is. Who would've guessed that you have to actually buckle down to "learn" tasting.