I have used marijuana for most of my life and I've stopped for periods of time, sometimes up to a year of no use, and I can vouch for the effects of addiction.

I have used marijuana for most of my life and I've stopped for periods of time, sometimes up to a year of no use, and I can vouch for the effects of addiction. For me the cold is colder, I sweat more (especially when I sleep) and I tend to be more grouchy. All of this for at least 2 weeks before everything is "normal" again. Even with these withdrawal symptoms I would still prefer marijuana to any opiates.