grey goose or belvadere with tropicana
gibsons 18 year or appleton reserve with coke
glenmorangie port finish/bowemore darkest on the rocks
bacardi razz/bacardi coco straight
Obviously because that is how I prefer it. Why else would you do it? Also when you are mixing it 50/50 you can still taste the difference using premium vodka. Not exactly ruining it, not that it's terribly expensive in the first place.