That being said, I also think that the game becomes way more interesting when enemies have a motivation beyond just "we're evil" and that you can't just have whole peoples be unredeemably evil. There's room for an elf necromancer that is evil because they view the dead, the living, and the undead as just things that serve their selfish needs, and a good (or at least non-evil) orc necromancer that animates skeletons to protect their village from dangerous monsters in the wild. And the game becomes more vibrant, more interesting for having the both of them in it.