Yes, I believe in UFO's as a paranormal phenomenon. I believe because of the preponderance of eyewitness accounts from sane, reasonable people who would have no ulterior motive to make these stories up. A former boyfriend of an aunt of mine saw a long cigar-shaped object hover under a tree in a field once, to lift up and fly away just moments later. The brother and uncle of a friend of mine once reported seeing round, red objects circle around radio towers many times. My mother woke one night, when I was about twelve, to see a little man, dressed in blue with a scowling expression on his face, standing by her bed and looking at her. Though terrified, she could not move, and eventually fell back into unconsciousness. Years later, reading about abduction experiences, she came to believe that she had had a similar encounter that night.
There was one night, not too many years ago, when my sister and I were driving back home from visiting our uncle, a few miles outside our home town. There was a heavy rainstorm, with the clouds very low and the rain pounding. As we were going down the highway, all of a sudden we saw a flash, as if lightning had just streaked above us. That was alarming enough, but when I looked to my left, towards the open field, I saw a green circular light glowing next to a tree. We passed by too suddenly for me to get a really good look, and it occurred to me that perhaps lightning had struck some vegetation there and had ignited something, causing the green glow. But I couldn't help but wonder, due to the strangeness of the sight, if it were something beyond the bounds of scientific explanation.
Just some stories to share, to illustrate better why I believe.