Elves: About two thousand years ago, elves invaded Meneluinin, then populated by somewhat peaceful orc clans. At that time the elves were more closely tied to their fae blood, and were cruel and alien. Over time and several generations their attitude has softened quite a bit, and most of the fae influence has faded since, with exposure to the mitigating influences of the other races. Elves have a similar height range as humans, but generally have a slight build, sometimes a bit androgynous. There are many subcultures, but most commonly elves are fair of skin and hair, with green eyes. They also have a much more flexible sexuality than humans and a higher incidence of bisexuality, although it is very far from being a universal trait.
Dragons: Dragons come in all shapes, sizes and colors, and though jeweled dragons do tend to be neutral in character, metallics tend to be good and chromatics tend toward evil, individual dragons do not always conform to stereotypes.
Undead: Mindless undead are evil purely because of the negative energy used to power them. As they lack moral agency they also lack the capacity for both good and evil. Undead who retain elements of their minds have a strong tendency toward evil, which can be overcome with great effort and strength of will. Occasionally sentient undead simply don't feel the tug toward evil.
Undead Duckies: At some point, a necromancer stitched together the corpses of a beaver and a duck, and reanimated it. Approving of his monstrous creation, he made more, envenoming the spurs on the feet of the male beaverducks to make them more deadly. For some reason, they do not register negative energy when scanned for evil--truly mysterious magic indeed.
Vampires: Everybody knows the myths about vampires. Some are true, and some are not. It's best not to assume which are which.