Playing 'vampire' and a game derived from another game, never really cuts it in my books.
For me it has to be a completely different game world with different values and rules.
And talking about insanity, my character is out of tilt with the world she is in and magic effects her really badly, so what happens?
She ends up being married to the most powerful magic user, in the game world and surrounded by his uber powerful associates.
It's really hard sometimes, having to throw a fit in the middle of a game because your husband is casting magic near you and a ref whispers in your ear that you have reached your limit of control.
(Or in one case, using it on you, so that you collapse to the floor, with him standing over you trying not to laugh and saying 'oops sorry dear, forgot and you were bleeding')