I do a 20 oz cup of very strong coffee every morning just for the taste and probably habit. Sometimes get too lazy to make it and it's not a big issue. My mom drank a pot a day and took naps. I'm not a napper, but having it or not having coffee is not a big deal. I do know some that can't function without the morning jolt.
My biggest issue with skipping coffee is that I could end up with a headache from lack of caffeine. So, I've tapered off on the amount I drink and am just about where I can stop it entirely. The wife has also read that caffeine could be a cause for Irritated Bowel Syndrome, so if I can remedy that as well, I can do without coffee.