Most Vampires get their own feed and don’t care who they get it from. But for the highest Lords of the Vampire hierarchy they have little time to go about the process of obtaining blood and prefer some of a good source, so they get their Quartermasters to take blood of good quaility from important victims.
He is fat, kind, witty and against violence. The last person you would expect to be a vampire
Not all vampires in the land of the dead are bloodthirsty killers that want to take over the world. Some are satisfied with immortality and want to spend an eternity without strife in seclusion away from contant war with the humans.
A possible answer to what happens to spells when a mage dies. If the spell is strong enough, say and enchantment or other permenant effect, part of the mages spirit may become lodged in the magic. It may be a way for items to gain some kind of intelligence, but a mage who has knowledge of this fact would be very hesitant about enchanting anyone or thing. He might have other plans for his afterlife than counting the change in your bag of holding.
Preists, I think, would have this sort of thing covered.