Maybe it wasn’t popular or it’s some random film you were too young to watch at the time?
Mine is The City of Lost Children by Jean Pierre Jeunet, which I saw when I was a teenager and now nearly thirty years later it’s the one film I still think regularly about. Dark, haunting and funny in equal measure it’s got a great performance by Ron Perlman and the production design and cinematography still look amazing to this day.
So what’s yours?