I've been to several scotch tasting nights over the years. Including one by Macallan where the guy doing the presentation was extremely knowledgeable. He made the point that adding a drop or two of water to a glass of good scotch opens it up and allow it reach it's full flavor potential. I think he basically recommended that.
Or something like that, it was a while ago and I was drinking a lot of scotch at the time.
Which means I'm an uncultured swine because, despite the advice of an expert, I still add no water or ice to scotch when I drink it. But that's okay, being an uncultured swine has it's benefits too.