Much of the zombies' allure comes from its mystique. Bits of flesh, chunked up across the face, reveal faint glimpses of the life which once inhabited this hollow shell. The burnt embers of a life somehow make the zombie out to be somewhat of a tragic figure; a being who never asked to parlay this grotesque lot in life. Not so with the skeleton.
This is not to imply that the skeleton sought out its position. Nothing could be further than the truth (except in one remarkable instance), but the fact remains that absolutely no glimmer of life exists within those brittle, dry bones. The skeleton is, quite literally, a cold, heartless being who perennially sports the creepiest grimace of mankind's history. Also, skeletons quite often employ the use of swords (more specifically, scimitars), giving them an added bonus during melee rounds.
The purpose of these words is not to condemn the zombie, nor to strip it of its hallowed status amongst true nerds and socially bereft individuals. Rather, it is to promote awareness of the creepiness which lay inherently deep within each skeleton. At the very least, I hope to stimulate debate in the academic world upon this very subject.