I've drank off many a bottle of whisky of various tastes and everyone finds their favorite, whether by taste or by price paid and the perceived value of their precious golden liquid. For me, its all about smoothness, its about the sweet, vanilla richness, its about the taste.
So far my absolute favorite is the single malt Balvenie 12 years Double Wood. Matured in Traditional Whisky Oak and then in Sherry Oak, imparting a subtle sweetness that is immediately pleasant to the nose its by far my all time favorite. The complex aftertaste trumps even the Ballantines 17years or even the ubiquitious Blue Label which is decidedly smooth but lacks any bite to its character.