Ghosts? Yes, from personal experience....voices, sounds of dancing in the den, appliances turned on in the middle of the night...really too many to mention.
UFOs? I didn't, but then listened to the testimony of many credentialed individuals that led me to question my beliefs:
https://www.youtube.com/watch?v=64njI0uNvGg
and the release of "Project Blue Book"
now, I guess I'm in the believer's camp.