They could be good or bad, still having the same personality. Another type would be a ghost who never was a human to begin with but a demon from Hell and considered quite risky. Overall the general population does not believe in ghosts at all. Today the commonly accepted theory is that any such type of activity represents the unconscious mind trying to find a way to let off a little steam. Many movies are being made today about ghosts and more books on the subject are being written but the fact remains that this is nothing new, for reported sightings and the belief in ghosts have been around for centuries.
People believe that ghosts or spooks, come back to live on Earth.
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