I personally believe in ghosts as I have had plenty of experience with them. Since an early age, I have been able to acknowledge them in a room, but I am in no way a medium. I have been sensitive to spiritual activity my whole life. Even as an adult, graveyards bother me.
My first apartment was supposed to be haunted and I saw nothing to support those claims. http://www.legendsofamerica.com/co-lumberbaron.html Some details on the building. I lived on top floor in turret area.
I don't believe in ghosts and the few instances where people I knew claimed to see them have some very dubious elements. I am open to there being more out there than what we see however, whether you want to use spiritual terms for it or not. I've heard at least one UFO story that I have trouble dismissing, from several conservative christians who did not believe in UFO's at all prior to this experience.