Persona- Latin for mask

Today's discussion was really interesting. Our different persona's we possess can be very distinctive to some people. For me on the other hand is very tough to discern between two different personalities I may possess. Anyways, connecting DJ Spooky's book and persona's, I wanted to bring up a point that I thought to be his idea in his book. He has 3 personalities or so, but what he argues in the book is stepping outside the boundaries that constrain us. Just from our discussion, it sounded like many people's alternate persona's where still constrained by the boundaries of our culture, adhering to the norms of our society; business, party, ect.. He argues for a different revolutionary thinking where we are not constrained by the norms of today. Deviation. In writing or music. He takes the normal boring conventional art and turns it into something remarkable. Now can this apply to personalities of one's self also? Or are these fixed in time, adhereing to our cultural norms of how to behave in certain situations and what not?