Drinking if you want to drink isn't always the best idea.
If you're the only one around getting hammered, and rationalize it with "Well, I want to drink," you're going to look like an alcoholic. Drinking is a social thing, and something that actually takes a little practice with before you become a "good" drunk. Ignore that last sentance if you actually enjoy stumbling down stairs and puking your brains out each night.
Obviously you dont need to drink because someone slurrs off "duuude, yous gots'ta take thish shhot wiff me" and you don't want to. It's common sense (or "moderation").
Do it when you want to, but not by yourself.