Typhoon
My wife and I drank regular coffee for years, but then she began noticing that it made her jittery, so we switched to decaf. We then both noticed that we would develop headaches around noon every day.....attributed that to the lack of caffiene that we had become used to. This lasted for about 2-3 weeks, until we "kicked the habit" so to speak.
Now we drink a couple of cups of decaf every morning, and lay off other caffinated drinks like Coke, Pepsi, etc. Like someone else suggested, I like just plain coffee.....not the flavored stuff, etc. The rest of the time, I drink water with lemon, or of course the occasional beer or a glass of wine.