Lol well we could both put down our ideas and go from there. XD

The one that I have floating around in the back of my mind is something like: Some sort of tragic event occurs in some building, be it an apartment, school, house, business office, ect... that results in the death of a young man/boy. Due to the reasons behind his death his spirit has been bound to Earth. He's free to walk to most place, but prefers to simply stay in the building he died in. The building becomes abandoned, but some corporation or organization decides to renovate it to be useable again. Depending on what kind of building it was humans can move in or use it for its original purpose. Either way one girl/woman begins to notice strange occurrences, but no one believes her so to prove she's not crazy she sets out to find whatever is causing the strange happenings, which ends with her meeting the ghost. From there it could go pretty much anywhere from trying to fend of ghost hunters/exorcists to trying to find a way for the ghost to pass on.

The other one that I have floating around is something along the lines of owners of a house, school or hospital report to a well known group of ghost hunters/exorcists that there's a haunting in the building and so they send one of their members to go an investigate. During the investigation the two meet. The ghosts actions were meant to only be benign rather than malevolent, and so the two come to some sort of understanding. It leaks out to the group that the hunter/exorcist came from that there is indeed a ghost and so it becomes a matter of finding a way to prevent the ghost from being exterminated and the hunter/exorcist from being turned into a ghost herself and exterminated. Or something like that. XD

The second one might require a few characters that might need to be created for the sake of the storyline, but they don't have to be major ones either. It could also turn into a conflict with the hunter or exorcist that first finds the ghost trying to decide if they should indeed terminate the ghost or not when they've found out a little bit about him so that other characters wouldn't really need to be created.