Black. Strong. Practically chewable. Italian, preferably.
I make mine in one of these:
...but it's nowhere near as good as the stuff that comes out of something like this:
and yeah, I grind my own beans (not by hand [http://ecx.images-amazon.com/images/I/41MT4PrrQBL._SL500_AA300_.jpg]). I get em bulk, though... about the same price as the cheap stuff that comes in cans, only far less acidic.

...but it's nowhere near as good as the stuff that comes out of something like this:

and yeah, I grind my own beans (not by hand [http://ecx.images-amazon.com/images/I/41MT4PrrQBL._SL500_AA300_.jpg]). I get em bulk, though... about the same price as the cheap stuff that comes in cans, only far less acidic.