As we know ghosts are said to be a manifestation of a spirit or soul. Either of a person or animal. These spiritual beings have been know to take on many different forms. I personally only believe in two different categories of ghosts.
They are:
Past-life Ghosts and Historical/Tragic event type ghosts. I do not believe in Demonic Spirits. I do feel ghosts just as their human counterparts can be good or evil and the spiritual beings would be an extension of their earthly form.
These type of ghost may be seen as Guardian Spirits. Which is something I feel most people can relate to and take comfort in knowing their existence. They are the entities that watch over us our entire lives attempting to help us get out of a dangerous situation. They are the voice within our heads trying to guide you in a different direction. These are normally the loved ones who stick around to watch over you. They can also be in the form of a messenger ghosts That show up only to warn of danger for future events before returning to their on plane of existence.
Some ghostly forms just have unfinished business, spirits that stick around to give us clues to how they past on. Perhaps maybe just waiting around to see their first grandchild or the Mother that left the world all to soon that is stuck in our world just wanting to watch her children grow up. I sometimes feel as if these ghosts may go about their business daily not even knowing that they are dead. This aspect of not knowing is probably a sad existence trying to figure out why people do not stop by anymore to say hello or g why those around them can no longer hear them speak.
All these apparitions can take on the following forms:
Full Body Apparitions: The is the be all end all of all Ghostly photos, the rare full body photos. These are the images of recognizable humans in which he subject appears either Partially or fully formed. As well as transparent, at least some part of it. In some cases the figure is full enough to be identified as a deceased family member of friend. Which has always been the most valuable paranormal evidence.
Vortexes: Those little clouds or wisps of light that sometimes appear in photos. Usually appearing as a swirling spiral of light, sometimes taken the form of an apparently opaque shape.
Orbs/Spears: is a basic ball of light that unexpectedly appears in a photo, normally white or bluish in color, In video some of these have been caught moving at a high rate of speed. But one persons ghostly image may just be another person's speck of dust.
Rods & Swimmers: Elongated rod shaped objects moving quickly through the air. Most of these are dismissed as optical illusions of insects.
The Poltergeist (Noisy ghost): this is perhaps the most well known ghost: know for their tendencies to move , in many cases hurtle objects around a room. Hide small items from the land of the living as well as produce usually loud and persistent noises. Though generally harmless they have the ability to frighten people that could lead to more traumatic issues in the faint hearted.