Is this a serious discussion? I've had a couple of weird experiences that I'm not eager to talk about. What I can say is that although they made me react and think and not know what to make of them, I can't say they seriously changed me as a person. If they were what I think, that's fine, if they weren't, it's a little disappointing but things are what they are.
I like the idea of ghosts myself. If they are real, I don't think they would be good or bad, they would be representations of what they were when they lived. They wouldn't be another species or something like that. If ghosts do exist I feel sorry for them. Imagine being stuck here and see others take over your home and not be able to do much about it other than occasionally scare them.
Marginalized in their own 'lives'...
We don't celebrate Halloween here in Norway. Some kids go trick or treating, but the fun things, horror marathons, I've only seen once or twice some years ago. I really wish the TV channels followed up Halloween with my fave genre, horror.