Part of the previously mentioned cultural shackles involves submitting to a personality lock-down.
At the Renaissance Faire, there was one young woman who played the Queen of England, year after year, at Faire after Faire. As she was carried aloft in her traveling palanquin by a dozen young men, all others at the Faire would fall silent and bow when she passed by.
I remember observing this one day, as I stood alongside a cynical news reporter. He leaned over to me and said, "How sad that this woman feels she has to pretend to be a queen."
I can still remember my response. "How sad that she lives in a society that doesn't see she has the nobility of a queen."
A role that allows a person to take on a beguiling new identity is a role the player will assume quite willingly, of course modified by individual taste. Even at the Renaissance Faire, those who enjoyed playing nobility wouldn't dream of playing a peasant, and visa versa.
In a game, we can escape our cultural shackles and become:
Or we can choose hundreds of other roles that normally aren't available to us.