I love coffee and drink it pretty much every day. The issue I found with coffee drinkers in North America (when I lived there) was that most people would order huge cups of extremely sweetened coffee. I use to call it sugar water with coffee flavor. The general level of quality of coffee was also quite poor.

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.