I think marijuana is the kind of plant that you'll get what you ask of it.

If you believe that marijuana is something that makes you less motivated, depressed, etc, thats probably what you'll get.

If you believe that marijuana will mellow your mood out, and you believe you can be productive and functional while having a good stone on, thats what you'll get.

I know smokers who are successful, savvy, and organized, who smoke before doing housework or important tasks with no difficulty, and they smoke everyday. I know other smokers who smoke also everyday, however its in their dirty house, and they are depressed and unmotivated where doing even the simplest of tasks is difficult for them.

For me personally, I do believe weed to be a natural anti-depressant. I know others who strongly disagree, I really think it depends on the person and the attitude going in.