First a little history, my Grandpa died before I was ever born so I never got to meet him.
I've told in my previous account what happened to me at my parents' house, I became aware of this occurrence around the same time. As a lot of people do, I used to stay over at my Grandma's a lot, at least on the weekends the other Grandma didn't snatch me up in a part wanting to visit/part selfish pique (as confirmed by both my Dad and Mom).
During these visits, everything would be quiet even after Grandma went to bed until I'd go to bed also. At that point, I'd hear footsteps from the front door, they'd pause for a second as if taking off a coat, checking mail, or any of the other myriad things that one does when first getting home. After the pause, the steps would continue through the kitchen into the hall between the two bedrooms.
At that point, I'd get a strong feeling of being looked over, not angrily, but more as if someone was making sure everything was alright, and then feel the same presence look into Grandma's room. I always had a strong feeling this was my Grandpa and despite not meeting in life, he knew who I was and cared deeply.
I know that this sounds residual, but there is one small detail that makes me think it was intelligent. After my Grandma's passing, I finally told Mom about it. Mom doesn't believe in the paranormal, stubbornly disbelieves in fact, but told me something Grandma used to used to tell her. Grandma, another person who didn't believe in ghosts, always used to say that she would feel Grandpa getting into bed beside her at night.
Again this could sound residual except for one detail, after Grandpa's passing, Grandma started sleeping on the side of the bed that he used to, and the feeling was never laying on her but beside her on the side of the bed that she used to sleep on.