I feel like we could get deep into the weeds about emotions, but I do enjoy your version of “ghosts can’t feel some emotions because they lack a body”. I think it could have some annoying side effect extrapolations like “ghosts don’t have eyes or ears or anything, so I guess they’re trapped in a sensationless nothingness” but since ghosts are made up, you could just say “they can see because of magic” and clear it up. Anyways, ghosts are a fun idea, and I’m glad people keep imagining up interesting versions of them.