Drambuie is a liquer not a pure Malt,a bit like Glayva, both have one major downfall, they are VERY moreish! When we were on the Broads, we did bring some local tap water in a bottle to make ice, purely for the Glenmorangie. Well with the prospects of an "Admiral !" coming aboard,things had to be spot on. One or two pieces of ice does bring out the flavour of Malt, but not essential.
Having done many whisky trails, I found it fascinating how just a few miles apart the flavour could be so different, this it largely due to the filtration of the water through the peats or lack of them. I personally do not like the Islay Malts like Talisker etc , to me they remind me of iodine! Any Speyside Malt should have a slight sweetness to the tip of your tongue as an after burn.
Right then, i've typed about it, now go find a nice one and enjoy it to the full!
Iain