Here's a nice little essay making the same point I made a few posts ago --but better. He points out alcohol isn't a truth serum, or we'd liquor people up before they testified in court. Then he moves to the broader point:
let's assume there does exist an "inhibited" version of us, and also a chemically uninhibited version. Which one is the "real" person, and which is the artifice? Most of us are proud of our victories over our inner childishness; if I am in my heart a glutton with a lust for fried okra, but I manage to curb that impulse, enjoy okra in moderation, and drop ten pounds, that might give me a small sense of accomplishment. But whose was the victory? Am I the glutton, or am I the rational person who saw and acted upon the need to control my gluttony?