This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
This has two answers.
First, which film scared me the most when I watched it: To my shame it’s Gamera. (I was a young child.)
Second, which film I consider the scariest now: Probably John Carpenter’s The Thing.