I grind my own often so that it is rather fresh, using a century old wall mount Arcade Crystal No. 4 every couple of days. I usually get one of Peet's dark roasts and generally prefer South & Central American, though Hawaiian, Sumatran and Ethiopian are enjoyed when the price is right!
Fairly strong through a Melitta filter, one cup at a time, and straight up black!!!
Just every once in a while, a finger or so of something "evil" finds it way into the brew, but that is rather rare.