For preference, a nice, light East African coffee, brewed quite mildly, and black. I've had some rather nice Kenyans, but also Ethiopian and Tanzanian ones as well

There are times when a strong, european blend is good, but for the ultimate 'It feels better now I've finished that' coffee, it has to be a strange concoction I ran into in Slovenia.
Very, very, strong expresso, with a big enough squeeze of lemon juice to bring it down to a drinakble temperature. Intersting, and the nearest available thing to where we were staying to actual coffee, being only 7 minutes walk away....

Quickly sorted out the relative importance of caffine/breakfast for people, that did.