You're the exact same person, except intoxicated. Whatever you or I make up in yours or my mind to explain that is yours or my business... "I think therefore I am... (drunk)". It doesn't "make" you who you really are, because you're already that, so there's no logic... 2 words
"who you really are" and "who you really want to be" are just terms people use as guides in decision-making. There is no fixed reality to them. If you decide that how you act when you're drunk is more the real you and start incorporating that into your life while you're sober it will be a self-fulfilling prophecy. And I'm not saying it's necessarily a bad one as alcohol can be a good social lubricant.