I am fine here but have had rooms that I avoided.
At our old place, it was the common basement that ran the length of the building. I refused to go down there at night, and I was not the only one. It was a six unit building, and at least one person from each unit felt the same as I did. We dog-sat for my parents one time and the big male was petrified to even walk by the door leading down there. All of us swear that something bad had happened, and maybe more than once. The stairs is where I felt the most discomfort, the open area was just "wrong" and at times the storage area felt like we were being watched. Again, I was not the only one who felt this, and having talked to others who lived there before and after us .....
At my parents house it is the downstairs bathroom. When we still lived there, my DS left his fake snake behind the door one night. I got up to go to the bathroom, closed the door, and then saw the snake. I tried telling myself that it was DS's toy, but ran out of there with my pants still down.

To this day I can not go in there, and close the door.
At my grandparent's, it is the basement. I am just now able to go down there by myself, but I am still nervous. My uncles (they are only 10 and 12 years older) loved to play tricks on me down there when I was little.
My in-laws it is the upstairs north bedroom. I swear there is a ghost, and I say "hi" to it everytime. Usually I feel safe but there have been times that I feel threatened up there. I ALWAYS say goodbye before going down the stairs, as I almost fell once (felt like I was pushed) and my nephew fell too. He was only 3, but told us that someone pushed him, when there was no one else up there.