Is your favorite film a ripoff?
Terror (1978) has been my favorite film since I saw it, in the summer of 2014.
The director himself admits that it was inspired by "Suspiria". Being aware of this, I have no intention of ever seeing what is possibly Argento's best work.
I was so thrilled by Terror that I've seen it about 55 times, and am convinced that the film that "served as it's inspiration" would never be as good, in my eyes. True story.