Vampires should be able to mingle with society if they need to, so as a player we can still interact to obtain quests etc, but should be able to transform on command (maybe even have to do a quest to learn to control the transformations) - downside being if anyone catches you drinking blood or transforming and manages to tell the townsfolk they will rise up against you and attack you on site.
That's my opinion anyway :foodndrink: