I drink it black. Used to be a helicopter pilot and then started flying fixed wing with passengers. It was all auto pilot. It was boring as hell. I kept falling asleep and my CO told me if I fell asleep in the airplane one more time I wouldn’t fly anymore.
The crew chief in the back fixed the coffee and didn’t want to trouble him or her to put cream and sugar in it. So I just drank it black. That was about 21 years ago now. I quit falling asleep in the aircraft. I still drink it black.
You acquire a taste for it. I drink 4 cups every morning.