We've done all of these already
I like it with lots of milk (from the fridge is fine). I also like it made espresso style, but with extra water, known as an espresso luongo. I put lots of milk in that, too. Rarely, I will substitute with soy or nut beverage instead of milk and, occasionally, a tip of the spoon of honey. I always use the honey when I have run out of milk, as I am not very fond of it black, although I can tolerate it black, if I must (when all that is available is the edible oil creamer or the powdered version, neither of which I will consume).
I prefer medium roast. Light is typically too acidic and has too much caffeine; dark is too bitter and the flavourful volatile oils have been scorched.