Thanks for all the recommendations here. A few I plan on trying.
All I have to contribute are a few personal tweaks to some standard recipes.
I like a Manhattan made with Bulleit Rye instead of Bourbon, and I like 1 shake of Cardamom bitters on top of 1 shake of Angostura. I've made this for several friends and exactly zero of them liked the Cardamom version, so, YMMV.
From the "ingredients matter" files....
I've been enjoying Whiskey Sours recently, made with 1 part simple syrup, 1 part "Italian Volcano organic lemon juice" (Costco), 2 parts your preferred Bourbon, 1 "good" * cherry with a bit of syrup and the white of 1 Quail egg (for froth).
*Good Cherries. Luxardos are decent and easy to find but wife agrees that Toschi Amarena are slightly more tart and make for a better drink. Bonus, you can buy them by the kilo from Amazon for $24.50. Way cheaper than Luxardos.
And on the Gin & Tonic side, Fever Tree tonics are worth the price.. We like the Mediterranean for G&T, but there are several others that are quite good.
ETA Link for Cherries above.