Marijuana was my drug of choice for a LONG time. The psychological addiction is a tough one.
Quitting marijuana was easy for me, because I started having these crazy panic attacks out of no where and I didn't have much of a choice.
I WILL say that quitting alcohol (even just for 9 days) has brought me a lot of peace in my crazy head, and I know I'm on the right path. It's just a matter of staying on it.
Good luck!