I love coffee too, but I don't feel like it has the effect of "pepping me up" anymore. I drink it almost as a snack, now. I have taken my intake way down, though. I used to do 6 - 9 cups a day, depending on the day. Now I'm down to 2, maybe 3.

I was always irritable, now less-so. I am not sure if that's the coffee's doing, though. A lot has changed since my nine cup a day days.