I do believe in ghosts, although I have never experienced anything, apparently I don't have the "gift". What really made me believe in such stuff was the fact that my girlfriend was scared to turn her back to a certain spot in her room. A friend of her mother is some kind of medium, and he could, without that she had told him anything, or nowing anything about the history of the house, say that the energy from a woman who lived in the house when it was a bakery came from exactly the same spot in the room. He could even give a detailed description of the woman that was correct, according to an old photograph that he hadn't seen.
How the hell could he know that if he didn't know anything about the house, my gf's feelings and the woman?! That made me believe.
Another quite funny thing is that our old appartment apparently is haunted. :D We never noticed anything, but the family that lives there now says that they feel very unpleasant while being on the second floor (where me and my sister had our rooms) and that it's haunted. Kinda funny. :D If it's true, it's like a proof that we don't have the gift. ;)