I've never encountered an actual spirit, but, my first husband and I rented a house on Holbrook Avenue in Bessemer, AL, shortly after we were married. It was an older home that was somewhat of a modified shotgun house - the front door opened into the livingroom, the door from the living room lead into the bedroom, the bedroom door lead into the kitchen, and the bath was off the kitchen.
The back wall of the living room was covered in mirrored, glass squares while the rest of the room was dark paneling. We had thought this was odd, but, it did make the room look larger. Shortly after we moved in, the man who lived next door walked over. He and my (now ex) husband were sitting in the living room talking, when, out of nowhere the neighbor said that the guy who used to lived there had shot himself right there in the living room and said that was the reason the mirrored tiles had been put up. We just laughted it off, but, it was unsettling.
Off the bedroom, in the front portion of the house, there was a very small room (probably 4 ft wide and 8 to 9 feet long) that appeared have once been a portion of the front porch that had been enclosed. I really can't explain it, but I NEVER liked going into that room. We used it for storage and I would literally open the door and throw whatever I had to put in there into the room. My feelings of uneasiness continued to get worse until I had to place a night stand in front of the door just so I could go to sleep.
I don't know if my feelings about the room stemmed from knowing a man had killed himself in the house, or, if, indeed, the poor man was still occupying the house. We didn't stay there more than a year, but, I still get a strange feeling in my stomach when I think of that room.