I have a world that doesn't have any personification of death. People's spirits either moved on or didn't, and restless ghosts were really common. On this side, they built up and annoyed the crap out of the spiritually sensitive living. The afterlife was a total chaotic mess, new arrivals wandering in at random, and eventually everyone there got fed up and tried to figure some kind of system. It wound up with a makeshift agency of "reapers" whose jobs are to gather the souls of the freshly dead and take them to the other side (and make them for an orderly line, damn it!). There are all sorts of people (living, dead, other) working as reapers, with varying levels of professionalism. It's a punch-clock job with all sorts of bureaucracy and red tape involved. It is actually pretty easy to become a reaper, but it's not a very glamorous job. In exchange, reapers get a basic power set required for their jobs. Everyone alive who can see them just let them do their thing, but no one knows too much about how the reapers work.
Can I second the general love for Discworld's Death (and his DISTINCTIVE SPEECH PATTERN) around here?