I drink several cups a day but even if I don’t I still feel the same. I’m not one of those “don’t talk to me before I’ve had my coffee” -guys. I just drink it out of habit and because I like the taste. I don’t feel like it effects me in almost any way. I can even drink a cup few hours before sleep. I guess you could say it’s an addiction since I do it every day and don’t want to stop but I’d still rather just consider it a habit in my case.