I never leave a bottle open long for it oxidizes and becomes trash in no time.
I'm not a big scotch drinker but I have lots of clients who are and feed me drinks from time to time. Over the years I've developed a bit of a taste for it.
I noticed that anyone who drinks can enjoy a well aged blended scotch; for instance johnny walker blue is smooth as butter and tastes like maple syrup. But single malt has a strong smoky peaty flavor that takes alot of getting use to.
Lagavulin is great, I've had it a few times and since its straight from the cask everyone varies a little bit in flavor. I find it a little too smokey sometimes.
Tallisker I also find has a bit too much bite for my liking. Plus spending 110 bucks on a bottle of Lag is wasted on my pallet.
Not being an experienced single malt guy I buy the occasional bottle of Macallans 12.