I've had a couple of mildly weird experiences but wasn't particularly spooked by them at the time. I've heard far more weird and very spooky stories from other people which I'll try to share later.
About 25 years ago I was living in a Victorian end terrace with my then partner. It was essentially a two up, two down to which a kitchen extension had been added at the back of the house. There was an alley between our house and the one next door which we owned but they had right or way through. We never used it because being an end terrace we had street access from the back garden on the other side of the house. The neighbours only used it if they wanted to take something into their garden which they didn't want to take through the house, so very rarely. I was in the kitchen, cooking dinner with my partner, one evening at about 7 pm when we both heard footsteps coming from the direction of the alley, the footsteps sound continued around the kitchen extension and out toward the street. There were two windows in the kitchen so we would have seen someone pass by on the path but neither of us did although we both heard the footsteps and looked out of the windows to see who it was. Our neighbours weren't CF's so it would have been highly unusual if they had just wondered through our garden. The gate onto the street was bolted and a bit rusty so made a screeching noise when wriggled open. We both went out to see who was there but the garden was empty and despite not having heard the gate being opened we looked out onto the street which was also empty. Neither of us are woo and despite finding it a bit perplexing didn't wonder if it was some supernatural occurrence. The fact that the memory is still vivid reflects that after all these years I have still not been able to come up with a logical explanation.
A few years later I was living on my own in a modern house. The house had two allocated parking spaces in a shared car park. I was returning from work one evening at about 9pm, parked the car and was walking towards the house when I heard the heavy breathing of a runner, no footsteps, the sounds came towards me and I felt the draft of someone running past me, quite close, but there was no one there.
In the same car park, again returning from work in the evening, I heard someone say "hello FOJN" but again there was no one there. I said hello back assuming it was a neighbour but got no response. I didn't recognise the voice and it was the kind of neighbourhood where people kept to themselves so I can only think of one neighbour who knew my name and she was female, the voice was male. I have to admit that one did spook me a bit as I wondered who was watching me from a concealed place.
I'll try to post some of the stories I've been told later.