I am convinced Ali G is my alter ego, in the true, etymological sense of other self.
Whereas I am a sedentary thinker, pondering the universe in the comfort of my own home with the utmost seriousness, Ali G is a worldly thinker, seeking answers from people practically as unenlightened as he is with the utmost comedy.
P.S. You could almost say Ali G is to me what Aristophanes was to Plato. Only I'm not as clever as Plato but the actor Sacha Baron Cohen - at least in his television work - is funnier than the playwright Aristophanes.