Mr K sees his older brother, deceased as of some years ago in a mountain climbing accident, all the time. Usually this is in dreams. He sees his wife, who died of cancer in 2006, frequently as well. This is usually in a dream but sometimes he will have a momentary glimpse of her and something will happen like a closed door will open, or something will fall off a shelf. Heck, I even saw her once in a dream - I didn’t even know who she was but later I described her to Mr K and he said that was her, right down to the straw gardening hat she used to wear all the time.
After my dad died I heard him yelling at me a couple of times, lol. It was very clear. (Some things never change!)
They’re just reminding us
For awhile after my mother’s passing, I would go into the kitchen and see all the cupboards open. I came to the conclusion that she was just dropping by. More joke than poltergeist. She had a great sense of humor.