I used to drink A LOT of coffee now it's like 1-2 cups a day, and i try to do the half-caff thing so it's not so much caffeine... the stuff gets me so addicted I get TERRIBLE headaches when I don't have coffee. And I get this feeling behind my eyes that feels like they are being sucked into my head. Oh man it sucks. But when I don't drink THAT much coffee, the addiction is not as strong obviously.