I don't know. I can feel a slight dependence on caffeine if I have been drinking a lot during some weeks and then stopping cold turkey (slight headache, possibly slightly more tired in a day or two) but it does not feel very addictive.
For a long period of time I only drank coffee during the week and not weekends, sometimes I stopped some summers and when I slept badly I stopped drinking coffee for a while. No problem at all with any of that.
I do like like the small energy burst in the morning when I'm working and I like the ritual when it is winter in Sweden it is dark and cold outside and you are freezing, then drinking a cup of coffee as you start up your computer is nice.
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.)
For a long period of time I only drank coffee during the week and not weekends, sometimes I stopped some summers and when I slept badly I stopped drinking coffee for a while. No problem at all with any of that.
I do like like the small energy burst in the morning when I'm working and I like the ritual when it is winter in Sweden it is dark and cold outside and you are freezing, then drinking a cup of coffee as you start up your computer is nice.