Pattience,
I agree that caffeine is not the truly bad thing, but in this case, again, it's all about moderation. Although I've drank large amounts of caffeine for all of my life, I believe the right amount of caffeine is way lower than the intake of the average coffee-drinker.
I don't drink it regular anymore (if only because I mostly love energy drinks, which also contain a lot of sugars and for the rest, my caffeine came from green tea. I'm not much into coffee), and can say I feel much, much better. I sleep better (I was starting to have insomnia), my resting heart rate went from close to a 100 to somewhere in the mid-80ies, my blood pressure dropped significantly as well and, most importantly, my water retention (which used to be really bad) is now almost non-existent.
Again, I'm not telling anyone to downright quit caffeine, unless they find themselves in a position where they want to for other reasons that just health, but quitting down if you experience certain issues like lack of quality sleep (which you often just notice because you need a cup of morning coffee), high heart rate, high blood pressure and water retention -- it's a good thing. Whether you are quitting caffeine altogether or trying to cut down, I find it beneficial to do it as slow as possible.
(And I'll admit, another reason why I no longer want to have a daily intake of caffeine, is because any change in caffeine intake (be it more or less) can result into heavy migraines, for which I then take a headache pill... Containing 200mg of caffeine.

)