Having been around a good share of both, my preference has always been to be in the company of a pothead rather than a drunk.  Having participated in the consumption of both, marijuana has never left me with a splitting head, hugging a toilet, wondering how my car made it to my driveway.  And that is just the morning after.  I have never smoked joint after joint until the blackout comes, having to piece together the events of the previous night with increasing regret.  Now, agreed, one does not have to drink with the same zeal and persistance as I used to, but with marijuana, you simply cannot reach these extremes.