Same,
I'm using a few different whiskeys but I don't use my better selections for mixers/cocktails and just drink those neat and room temp. My favorite currently is Four Roses for just neat Bourbon. I had done a few different versions of the Whisky Sour but I find it doesn't matter too terribly which whisky I use, so I use a cheaper one for that. Mostly Canadian Whisky, inexpensive but works, as a daily cocktail mixer. Over time I went from pre-mix sour mixes to my own and came up with the Crystal Light Lemonaid mix (no sugar) and then spiked it heavy with real lime juice in a spring water jug. Makes a gallon of great sour mix. I just then pour myself either a glass with the whisky and add the sour mix. Or I add the whisky and sour mix and ice to a big cup and blend it into a daiquari/smoothy and its just awesome. Inexpensive. Low calorie, no sugar (other than what's in real lime juice).
Very best,