[JanSt]

I have cycled between heavy consumption and no coffee intake at all. On the first few days I often had headaches and felt slightly depressive (I'm pretty much never feeling depressive otherwise) and unproductive. After a week or so off of caffeine I start to feel great until I restart my coffee habit (the first few days are amazing; it just tastes too good; it is social to drink coffee with friends, family and coworkers; etc.)