I always played a male revan with the head of the guy with the slicked back longish hair, but I've seen him in the preview probably just old though so I'm not worrying
I think that choosing the portrait would be better though, because as I played I built up sort of an attachment with my PC and I would be very reluctant to give that image up.
But s/he will be probably be wearing the mask as to keep everyone happy, but who knows