My buddy Richard lived in a hundred year old house with his folks. They went to Maine every year for two weeks so us boys (23 years old at the time) would use the house (respectfully) when they were away for some place for us to chill after work, after workouts etc. One Saturday afternoon we were having tea in the kitchen when I heard slow, creaking, shuffling footsteps on the floor above. (Like an old person walks) I asked Richard who was home. He replied, "It's just a ghost who lives here. He doesn't bother anything."
Richard was a very quiet person, never said much, never got too upset with anything. Me and my other buddy immediately flew up the back stairs, which were right behind us. Nothing. An hour later, the steps were back. His family dog was in the kitchen this time and we watched it watch the ceiling and track the footsteps across the ceiling again. It was very odd. Richard said, "happens every once in a while, been like that since I was a kid. My folks don't care, they were told a ghost lived here by the previous owners who were really old. And - it always walks the same way, front of the house to the back, never anywhere else."
I hadn't believed in ghosts at the time, but some people I know well and trust, have told me of similar things since then. And many of these people really don't believe in anything other than what's in front of them. Never heard of any incidents where it was scary or damaging.
So, yeah, I kinda do. I would have loved to live there to experience it over a long period. Would have been interesting.