Interesting. I’m in that camp too where I never got that “shock” moment when Vader said he was Luke’s father; it’s akin to asking me when I learned what the color red was and how I felt. I don’t remember, I just know. Where we differ though in respect to OP is that I don’t quite remember feeling like it was a documentary. I knew it was a fantasy. What made me concious that these films were movies was probably due to seeing some specials on TV (I think one was called Empire of Dreams…?) and those programs would show some behind the scene stuff. That really sparked the imagination in me and even now, I dream of becoming a film director of sorts, and it’s all because of Star Wars, knowing how it was made was really exciting to me just as much as watching the films.

Side note, though I’ve mentioned it before, it’s funny to me how I must be in the minority that really found TPM super boring despite seeing it at age 4.