Any kind of mixer ruins the taste of good whiskey, tho it and Scotch can survive a little water.
At worst I'd pour some over ice. The really good single malts I'd drink neat.
My overall favorite tho was a shot and a beer. I sipped whiskey in order to savor it.
What ruined me was overseas service in USAF where the booze wasnt taxed. Once you get used to Crown Royal quality stuff your days of drinking swill are over and that can put a hurt on your pocket book once you hit stateside again.