Never having liked the taste of coffee, I rarely drink it. I think the first time I had one was in a school field trip where everyone decided to pull our first all-nighter. Now I only use it when I need to finish something with a deadline and I can't possibly sleep to do it (this would be mitigated with better time management, but alas, this is how it is). Never having made an habit of it though, a single espresso (1…
I generally drink my coffee with a little bit of milk and no sugar. It is quite easy to do when you get an amazing shot of espresso (or make it yourself at home with an AeroPress for eg.)
I never really feel any kind of disturbing feeling from coffee. I do get that feeling from energy drinks and generally avoid them.