Halloween (1978)
I'm not a big horror person, so that aspect might've been a little lost on me, but I did really appreciate the genuine mastery of their clearly low budget.
They used a cheap repurposed William Shatner mask, a few mics and cameras and not much else and made it all work. All the sets are real houses, lived in or abandoned, all the lighting (as far as I can see) is made up entirely of the sun, street lights, car lights, house lamps, etc and they give a film a very natural look that would probably have costed ten times as much as the entire production to make in a studio or with CGI.
The only effects that don't hold up are the blood and the handful of leaves they sprinkled around to make their summer suburb look like autumn but my god, even when you see the flaws, you see the fucking movie being made.
sick ass movie