Never ever drank it until halfway through my summer internship a few years ago. Was a pretty good morning person on the farm, but sitting in a chair at 8am does not keep me awake. Got used to the company machine's cafe mocha.......then they switched machines and the new one tasted even worse than the old one. Never thought I'd get used to it, but 3monthsish later, here I am.
I only drink half a cup, and I just skip it on days the machine is broken. Did have it a few times outside of work right before the time change and when we had to drive long distances in the early AM.