We've lived in a couple haunted houses. One we didn't own, one we did. The place we did own was happy, none of the previous tenants ever bothered us. We loved the house and were working on restoring it. The other one we were renting, and it was plain creepy. No apparitions, just the sense of being watched.
My wife and brother have seen ghosts, but not me. I guess one was standing beside me near an old wrecked car one time (the one my wife saw) and when I walked over to her she asked me who the other guy was. Nobody there.....her stepson was with me and verified no one else was there, his wife was with my honey and also saw the other person. There's more stuff in Heaven and on earth than we will ever know.....
I would like a ghost cat though....no litter box!