So many stories.
My brother used to talk to a man in the corner of his bedroom as a child. My mother also reported someone sitting on her legs and chest in bed, and so close could hear his breathing. We later found out the previous occupant drank himself to death after his wife left.
Shortly after i divorced my first husband, I took in a lodger. Who it seemed, attracted various entities in the house. 
He reported something trying to push him down the stairs, and we woke up most mornings to the TV being turned on, but no channel, just static. To test this wasn't just us leaving it on by accident, we unplugged it one night. Yes, in the morning it was on, but still unplugged.
The TV also occasionally changed channels itself and when we engaged with whoever was doing it, they saw it as a game and flicked channels faster. We even recorded this one occasion, just to check we weren't going mad.
Another time we were sat in the living room, in summer and he had put on the fire. We sat getting hotter and hotter until I said, are you warm enough now. He exclaimed that he was boiling and he thought I had put the fire on, obviously I hadn't. In fact it was a plug in electric fire, and I almost never bothered to use it as it gave out very little heat!
I believe most of the occurrences were my gran and grandad just letting me know they were keeping an eye out for me, but not all.
He was quite a promiscuous young man who had several lovers, so I suspect the other ghost was possibly the lady who originally owned the house who wasn't impressed with his behaviour. Although whatever pushed him downstairs, he believes had followed us back from the wood one day following a dog walk.
When he moved out, it all went back to normal!