I don't have any good ghost stories... I haven't had any experience with them... I know I have sometimes thought I might have felt a "presence" but I'm not sure to write it off as my own imagination, or an actual event. However I've never had objects move/appear at random, or actually heard/seen anything.
I used to have a friend who loved looking up "ghost pictures"... It was fun looking at them with her, because a lot of times in the images people would see a piece of dust out of focus in the picture and say it was a ghost... "orbs" they call them. All of the "orb" pictures I've ever seen were actually out of focus dust pieces caught in a flash, in a dimly lit area. A lot of times she would also mistake photoshops for the real thing >.< even when it said it was fake in the caption XD.
I find the whole idea fascinating, but I don't know if I actually believe in ghosts - my rational mind says "no", while my curious mind says "it's always possible - because not everything can be explained.. yet".
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I've seen what I think were "unexplained lights in the sky" though... However, I've never seen any "flying saucers" or other actual objects other than random strange lights. But then again a trip to Devils Tower might have put my mind into a state thinking it was aliens. Not to mention the fact I was around 15 when it happened.
My dad and my sister and I used to take road/camping trips in the summer back when I was in high school, Yellow Stone, Mt Crazy Horse, Devils Tower, Mt Rushmore, etc.
Devils Tower is really amazing though. It's a volcano. It's core solidified, and then rain/wind eroded the outside of the mountain over several years, so all you can see of it is one gigantic stone core sticking out of the ground. It is really cool.
Well, a certain Mr Spielberg made
a film using this geological phenomenon as a setting. The local
KOA just so happened to do a "screening" of said film every night we stayed there. They would project it on to the wall of their office building so you could watch the movie and see the actual tower in the background. It was really neat.
On the way home from this specific trip, somewhere in Nevada, we stopped at a campground for the night. My sister and I wanted to take a walk or something so we set off and wandered around the place. I don't remember the exact circumstances but I do remember, around dusk, looking up at the sky, above the horizon to see this really bright light hovering. I thought it was a star at first - but it was brighter than any star I'd seen. It stayed there for a second and then quickly dropped to the horizon.
The easy explanation is that it was an airplane, but it seemed brighter than any airplane lights I'd ever seen, and plane lights usually blink - this was a very steady light, no real twinkle or flashing of any kind. In truth it could have been a shooting star/space trash falling from the sky, but it was still a rather neat experience that scared the crap out of me. XD
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The only other thing I can think of is this: My sister's daughter was born about a year or so after my grandmother died - both my niece and grandmother were born in November, and well when she was a baby - she looked almost EXACTLY like a baby version of my grandmother. She looks more like a clone of my sister now, but it used to kind of freak me out.