My story is neither long or frightening or terribly exciting; it's more the type of story that gives you a few goosebumps and makes you wonder if you really saw what you thought.
Only once in my life have I seen what I believe to be a shadow person, however it's not a typical shadow person based upon some of the research I've done. I felt no extreme unease or malicious intent. Being that I simply felt calm, confused, and yes a little nervous undoubtedly from having been young and experiencing the unknown makes me think it was perhaps one of the elderly people who used to live in my house before my parents bought it. Violet and Francis were taken care of by my grandmother and I believe both of them died in the house.
I was in my mid-teens in my room just sitting on my bed with my right side facing the door. I must have been doing my homework or reading as I remember it being completely silent in my room. If I hadn't I probably wouldn't have even noticed anything. Anyway, at some point I felt...something...and turned my head in time to see my door knob turn in extreme slow motion (leaving me to think it was my mom or brother since my dad always knocked first) and I waited to see what they wanted. To my surprise when the door did open it was only about an inch or two and then in a flash shut again. Since I was already watching the door I was able to see that what had opened my door was completely solid, darker than black black, right up against the door opening and no details/features. It wasn't the height or my mother, father, or brother. I immediately got up, opened the door and no one was there. I hadn't heard any footsteps either. Through a bit of quick investigating I discovered that all of the family members were preoccupied with one thing or another at the time so there was no way for any of them to have opened the door.
Aside from that, when my brother was a very young child he once told me that he saw shadowy figures dart about his room, mostly around the floor or no higher than a couple feet tall. He called them The Witches. I have no idea what they were or what they were doing and I never saw them, but I don't recall him ever showing fear.