I drink 24 oz (4 6-oz cups, or whatever the number on the side of the coffee pot means) on days I brew it at home. I get a medium coffee at the bike ride coffee stop.
I first drank coffee the day after I graduated from HS, May 1970. I didnt like cream in it, so I just added sugar. Could never get the right amount of sugar so I went to straight black coffee a year later.
The only possible problem with black coffee is how hot it is. Too hot to drink quickly on a short bike ride coffee stop. Several years ago I tried a latte at the MSP airport, and discovered I liked that. I dont have them a lot, but every now and then I enjoy a latte.