This is a very thought provoking thought. I understand what you mean, it reminds me of a kind of disillusion of ego that can occur when one is having fun or absolutely focused on ones work. But mainly what I thought of is the idea of being an actor for ones entire life, never being a concrete self, but perpetually acting. Taking on different roles in different circumstances, who was it that said life is but a stage. I know I am probably missing your point but I did grasp what you meant when I read it, I swear.