Will Caffeine Cause Health Problems?

numbski asks: "We're all geeks here, and I think there is no question how much we love our caffeine. What concerns me is that my fiancee has noticed how much I take in during the morning, and that I even use Diet Pepsi in addition to pain killers as a medication for headaches. So I did my googling about caffeine and addiction. In the minority, you have one report making a scientific claim that there is no such thing as an addiction to caffeine, however many other articles (not to mention marketing propaganda) suggest otherwise. Perhaps not just the sake of having an addiction is what concerns me, but whatever other side effects. I generally take good care of myself, go to the gym, exercise, play hockey, eat right. I hate to have a stroke or heart attack later on in life because of the stuff. I'd be curious to know the thoughts of others who take in large amounts of caffeine, and perhaps what their doctors have said about it. I plan on talking to my own soon, but it seems like this warrants discussion amongst those who consume the most. Would/does this prevent you from grabbing your Bawls and running like hell?"