Let's get back to cv, ok. To be honest, I think that the more we understand a character, the better. After all, a villain who is evil for evil's sake is boring and the story of LoI makes drac seem more human. It simply makes the villains more complex and allows us to get inside their head. Then again, not everyone is interested in that.
Unfortunately, most people just want a clear cut "good vs. evil" game with no significant plot twists that is easy to follow. However, I think the really intelligent players would want a complex story with significant plot twists to make the story more unpredictable and not so clear cut.
This just my opinion and I apologize is I have offended anyone.