This turned out to be a mini-novel... sorry about that...
In 1985 I bought my first house... a 50's era ranch style in your typical cluster neighborhood. Based on the appraisal and the comparables, the seller was asking a very good price for it. He had bought the house about six months earlier from the estate of the original owner. I asked why he was selling it so fast, and he told me he had bught it cheap, did a few things (added central air, carpet, etc.) just to flip it for a little extra coin. Cool. I'll take it.
Shortly after we moved in, the wife and I were laid out on our respective couches one night watching TV. I nudged her and said "bedtime". She said "okay". I went into the bathroom and proceeded to brush my teeth so I'd have fresh breath for the inevitible hanky panky that would ensue. While I was standing there brushing my teeth, I caught her out of my peripheral vision passing by the doorway to the bathroom headed down the hall from the living room to the bedroom.
I could hear that the TV was still on, so I poked my head out into the hall just in time to see her disappear around the corner into the bedroom and mumbled through a mouthful of toothpaste, "You forgot to turn the TV off". She didn't respond, so I finished brushing my teeth and went out in the living room and hit the power switch on the front of the TV. From the darkness of her couch I heard her say in sort of annoyed tone, "Hey, I was still watching that". I switched on a lamp, and there the wife lay... still on her couch... still covered up with a blanket. Chills ran up and down my spine. I didn't say anything to her about the incident because I figured that she'd think I was losing my marbles... but I knew what I had seen.
Shortly after that, other strange events started occurring. First it was the toilet seat. If the lid had been left up, it would drop about ten minutes after we went to bed. I must have checked the lean on that toilet seat a dozen times, and there was no way it could fall by itself. So we started leaving the lid down. It still got dropped ten minutes after we went to bed every night. Even when the lid was already down.
Then doors started closing in the middle of the night. I'm not talking about just gently swinging shut due to a mishung hinge or whatnot... I'm talking about bump, bump bump, bump all through the house in rapid succession. Every door in the house would get closed once each night, whether it was closed to begin with or not.
By this point I'm starting to get a little weirded out. I was telling my next door neighbor... a little 80 year old widow about this, and she said "Yeah, Ed and I figured out that it must be Howard". Ed was the guy that I had bought the house from. I asked "Who the hell is Howard?" She said "Oh, he was the guy that owned the house before Ed. He died in his sleep from a heart attack about six months before you bought the place". Now I'm thinking to myself, "Great... this buttwipe Ed sold me a haunted house".
It didn't scare me, but it certainly gave me the willies. Howard never did anything threatening... just showed himself to your peripheral vision and made a lot of noise. After a while we got used to it and sort of settled in with the knowledge that we had a jokester, barely visible roommate who didn't pay rent.
One day about a year after moving in we decided to do some remodeling around the place, and the first to get done was the bathroom. We pulled the old sink out and put in a nice oak vanity, got rid of the shower curtain and put up sliding doors, new modern medicine cabinet, etc. Full reface. As an afterthought, the wife thought that an oak toilet seat would be a nice touch to go with the oak vanity, so of I go to Home Depot to get an oak toilet seat.
That night, the toilet didn't drop and never dropped again for the entire time I lived there. I couldn't sleep for a week after that because I kept laying there in anticipation of the toilet seat dropping, signalling that it was okay for me to go to sleep until the door closing session later in the night.
The remodeling progressed on the house, and it came time to paint two of the bedrooms. The doornobs and hinges were original and ugly, and I thought since we were putting new paint on everything, lets put new hardware on the doors. You guessed it. After replacing the hardware, the doors to those two rooms quit being closed at night. Even before I got around to painting the rest of the house, I went out and bought new hardware for every door in the house, and immediately the door closing ceased completely, and never happened again.
But Howard kept finding things to mess with. They were always old original stuff that was there when he lived there. Next was the kitchen cabinets and drawers. Sqeak, clunk, squeak, clunk, sqeak, clunk, in the middle of the night from each cabinet and drawer being opened once and closed. I replaced the hinges and pulls on the cabinets and the sliders and pulls on the drawers when we remodelled the kitchen. That stopped the cabinets and drawers. Then it was lights turning on and off at random during the night. I replaced the light switches and that stopped. Then the screeching noise of the knobs of the handles on the old roll out window being spun. Replaced the windows with new vinyl windows and that stopped. On and on and on until everything in that house that was original had been replaced.
Finally about three years after we moved in, Howard was completely silenced. We still saw him out of our peripheral vision regularly, but he never made another noise again. I saw the guy that I bought the house from about a year after that and the first thing out of my mouth was an angry "You a**hole, you sold me a haunted house!" He turned red as a beet and started stammering. I started laughing and shared the stories of how I silenced Howard with him, and he said if had he known it would have been that simple he'd never have sold the house, but that the whole experience had freaked his wife out so bad that she refused to stay in the house for another night after the doors started closing. She had been staying at her mother's house for almost the entire time they owned that place while he got it ready to re-sell.
I lived in that house from 1985-1999, the whole time with a roommate named Howard. By then I was ready to get out of the Atlanta area, and property values had skyrocketed. I put it on the market as a FSBO for twice what I had paid for it, and had an offer within a week. I told the guy who was buying it that it was haunted, and he said "bulls**t". I said "No bulls**t, it really is". He just laughed and said "I don't believe in ghosts". I said "Whatever, but you will" and took his check to the bank. I called him up a few months later and asked if he'd seen Howard yet, and he said yes, and that he believed now... but that Howard didn't bother him, so everything was cool.