While I looooove Laphroaig, Lagavulin, and yes The Macallan, my favorite for a while now has been the ridiculously affordable Bunnahabhain 12.
As far as blending goes, the practice has definitely gotten bad press over the decades, but there are plenty of really great blends available. It's simply a way to highlight the character/strengths of more than one whisky in a single dram. In fact, my "daily drinker" has been The Famous Grouse for years - a bit of peat, a bit of fruit, and a balanced finish that is so satisfying.
@richardbrand +1 on the "no ice" rule, but I do add a single or sometimes two drops of distilled water to my glass. I was very skeptical of how this could possibly change the profile of a potable with such a strong flavor to begin with, but one taste test later I was convinced.
FWIW, I use "pretty good" PCs in my system (all AQ ranging from their Z series through Monsoon), but I confess I have not done a listening test, blind or otherwise. I can say I am a sucker for a pretty face, and they do look nicer than stock PCs.