Raising paw about ghosts and UFO's. I have "experienced" a ghost and so has my mother - being an open-minded sceptic I am willing to concede that there may be weird psychological or physiological things going on that may explain what I experienced - I know the mind can play tricks - I find it very difficult to explain away to myself, but I wouldn't call it concrete evidence of ghosts or anything.
I have also seen a UFO, in the literal sense of Unidentified Flying Object, and was with a group of people at the time. It wasn't a floaty thing, it was a "pulsing" thing. It was extremely weird and none of us (the group included a scientist, though he's an environmental scientist, not a physicist or anything like that) could think of any rational explanation for it. So we shrugged and went on with our lives (after having gone back to the verandah, had a few more beers and told UFO and ghost stories for the remainder of the evening, as you would) - but I still find myself gazing up at the stars now and then wondering if I will see it again.
Having said that I too think the alien abduction thing is a bit suss. I should probably be more sympathetic, having experienced weird things myself and knowing others who have - but seeing things you can't explain is a whole different kettle of fish to being taken up into a flying saucer and interfered with.
I can understand people who still want to believe in the Sasquatch. A part of me - a large part - still wants to believe that there are Tasmanian Tigers surviving in the inaccessible wilds of Tasmania. The rational part of me knows how unlikely that is - but the hopeful part that cheers for wonderful things wants to be blissfully ignorant of the facts. So I say to anyone "Oh, they're extinct", but there's always a little voice adding "probably" inside the privacy of my own head...