I would most likely go 24/7 but there is no way I could seriously answer this unless I was preseted with the situation first. I do not plan on transition and I am straight so what would the point be to 24/7?
I like Karen's answer, if I were 24/7 I think it might be less enjoyment and more of a chore to get made up. I know my SO feels it is a hastle to get dolled up all the time. Even we sometimes go for the hum drum look rather than the pretty barbie look, I know I do.