Okay, you got me there.
No wait! It's evil because as a sentient being you would understand the suffering you're inflicting while an animal (presumably) wouldn't. Ha!
Okay that's pretty lame too.
Still, the point I was trying to make is that maybe a vampire isn't evil because they feed on the living, but a vampire who enslaves thralls for feeding could be considered evil (slavery etc).
Good and Evil depends on the persons perception. What I may see as good some of you may see as evil, its all down to how we as individuals see the world around us.
Ghengis Khan was he an evil warmonger or was he a devoted father and leader of his people ? In this instance I would say he was a honourable man with good intentions. Its just that the era he lived in the things we read about may seem extreme but back then it was a different world where life was cheap and fast.
A Vampire who never kills its food source or only kills those who are not innocent evil or good ?
How can one thing be evil just because of what it is ?
Being evil is dependant on its actions not its nature, if it enslaves thralls and kidnaps people to feed on then its safe to say its evil. But if it lived a peacful life and only took blood from those who gave it willing or from Bandits out in the wild would it still be evil ?
We could say that all humans are evil because we eat other living things whether they are animals or plants, thats if your saying " because they drink the blood of humans they must be evil." Doesn't matter if its a sentiant being the upshot of it is in Skyrim and other fictional media Vampires are the top of the food chain reguardless if they was born or turned. Humans say they are evil creatures because its born out of a fear to survive and live past the encounter.