I don't see dead people, but they do come to visit my dreams.
Mom had a recurrence of breast cancer, after an eight year remission. Shortly after the diagnosis, I dreamt that my grandmother (who had died 12 years earlier) was sitting in my dining room, saying " Victoria, (my mom), where is your father? (also dead). We have to get going!" This was so characteristic of my poor grandmother! She was always waiting for Grampy! The dream didn't upset me, although I guess it was a warning that Mom wasn't going to beat the disease this time- she died about 8 months later. I've dreamt of her several times since. In the dreams, we're both aware that she has died, but there's no sense of it being odd. The dreams are very comforting-she's happy, and she has hair! (which she didn't at the end.) After her mother died, she had dreams about her, until the final one, when Mom said to her "You're not supposed to be here anymore." That was the last dream Mom had of her mother.
This does make me sad, because that's what happened in the last dream I had about my mom (about 6 months ago.)