Thank you folks for your kind replies.
@anattaboy: The caffeine can be tough in the beginning and you should lower the caffeine intake gradually at first. There are some things you can do then. I've had some effects of the withdrawal at even 6 months, but you can do it if you want to, and I've gotten used to life caffeine-free and to be honest I notice some certain psychotic symptoms in people I see use caffeine regularly. Read the book Caffeine Blues by Stephen Cherniske, it'll give enough information in my opinion about the effects and pharmacology of caffeine etc.
