Dark roasted coffee is great for making a caffe' latte like they do in New Orleans. Just brew a pot and while it is brewing you can tell there is a difference. And just wait til you try it, there is nothing else like it.
Dark brown, shiny with oil, burnt undertones, acidity diminished. At the end of second crack. Roast character is dominant at this level. Little, if any, of the inherent flavors of the coffee remain.