FWIW, there are "whiskey" and "gin" kits out there where you get the stuff (charred barrel for whiskey, adulterants for gin, etc) to "make your own" with neutral grain spirits.
Everclear is good for making new and interesting beverages. I used some to make a blackberry hootch that was wonderful (not only to my palate, but to a coworker's). I soaked blackberries in a couple quarts, muddling the blackberries in the liquor. After a few weeks of that, I filtered the solids out, then added about half a cup of simple syrup and a cup of distilled water. Dayum. Packed a kick, but had a great flavor.
Next time, I'm going to soak blueberries.
Chris