We lived in a fab old house, had lots of things happening there. It was three floors, street door opened onto open-plan middle floor with kitchen and living/dining room, upstairs was bedrooms and bathroom, and basement was bright and airy open-plan with windows, with a big laundry room and a massive storage room.
There was a horrible creepy feeling in the living room, in one corner. Also in the basement in one spot in the middle. A friend figured out that the two spots were actually in the same place in the house (weird floorplan!)
Lots of people saw something going up the stairs, including my dad who we hadn't mentioned anything to - we were sitting having a cuppa one day and he jumped up and said "Someone just went up your stairs!", and a friend who was over one evening and suddenly went white as a sheet as a figure appeared in the doorway.
I got home one afternoon and went upstairs with a cuppa, and halfway up a black shape shot up from in front of me and went up and around the bend to the bedrooms. I assumed it was our cat, strolled into the bedroom and there was our cat just waking up on the bed, all sleepy eyed and yawning. No other animals in the house (I did check!)
One night me and DH were in bed but not asleep yet and there was a 'slide-THUMP" from downstairs (cat was with us). Sounded like a book or something sliding and falling to the floor. Then it happened again. I got up, checked the middle floor, went to go down the basement and the light popped and went out. I grabbed a torch and started down the basement steps when I realised that's just how horror films start so I hightailed it back to bed. DH was asleep 
. Never found out what it was.
We had a frequent noise of a ping-pong ball bouncing in the basement. You know that PING....PING.... ping..ping.pingpingping noise. We never found the source (it definitely wasn't DD's toys and we didn't own pingpong balls!)
The weirdest was late one night, I was up alone watching telly and suddenly a curl of smoke appeared right in front of me. It was close enough that I had to lean back to focus on it, it was about six inches in front of my face. I had a WTF?? moment while I stared at it, then it vanished. Didn't fade out, just vanished.
Loved that house 