What powers would you want? What house would you haunt? What monster would you be? How and who would you haunt? Attic or basement? Maybe the foyer or perhaps the bedroom?

Zombie hordes or some vampire counts? you could be the lord with massive numbers of spawn, perhaps necromancer or vampire king, or even a corpse god of some sort, maybe the ghost ghouls race will grant glory to your grace?

Pumpkin patches taken sentience and possessed by spirits, they tendril their green tentacles outwards and nab mousey psychic girls mmmmmmmmm.