In the Jenny Crumb series, my characters often encounter ghosts. The way Jenny sees ghosts varies a bit. Sometimes she sees them as half transparent and half solid. Sometimes she sees them as live in-the-flesh people. Other times as white or dark shapes.
I don't think I've ever seen an actual ghost, though one time, I thought I saw a dark figure of a man near my home office door. But I HAVE had some pretty weird occurrences at home...
For example, my son had a remote control car. While the kids were in school, this car would drive around the house by itself. One day, I was drinking a cup of tea at the dining table when the car started doing its thing. I said out loud, "If you think you're all that, let's see if you can drive backwards." AND IT DID! I was pretty freaked out. I took the battery out of that thing and stuck it in a box in the garage.
Have you ever seen a ghost or had something spooky happen in your home?