Blain, I think I can say I have read every classic science fiction book written, and a lot of the newer books. The most interesting series was Isaac Asimov's Robot series. Some of the books in the series have been made into movies.
Asimov was also a professor of biochemistry and chemistry in his "real" life. The books start on earth, and gradually move into the whole universe. But there is only humanity. Some simple life forms, but no species that could act and think. Asimov was also an atheist, despite being a Jew by birth. In his studies of chemistry and biochemistry, he concluded that there was no way for life to arise in other planets or galaxies.
He concluded, that because there was no God, the circumstances which would lead to another intelligent race, anywhere in the universe did not exist. Humans are alone.
One thing I was always careful to do in reading science fiction, was to remember it is fiction, and it is not real. Asimov closed the door for me on extraTerrestrials. When a chemist like him says it is not possible for life to arise elsewhere, I believe him. The Bible is clear Jesus came to die for humanity, not some strange life forms a trillion light years away God created us, and no one else. I agree that UFOs are just some kind of demon inventions. We need to focus on Jesus, and put away this delusional thinking!