[Sadrain]

I don't take that as a role play, when you role play, it is more likely that you make something completely else and then 'breath' life into it, live as that person. What you mentioned, is more like bringing some aspects of your self out. And, true, many do that, either they become more perverse, brave, cruel, but the idea is the same. But that is not role playing.
Of course, that is a thing each of us can perceive and understand differently.