I saw it in the theater, during its first run. It was not really a popular movie at the time; It was ahead of its time. I think I was 14 or 15 and probably too young to fully appreciate it.
For instance it wasn't until eons later, during the director's cut perhaps, that I got the possible replicant reference; That is to say, Dekard dreaming of a unicorn, then Edward James Olmos' (an unknown actor to me at that time) character leaving a unicorn origami at this door. I originally just thought that was his way of saying, "Hey buddy, I was here but let you go", rather than a hint that he was a replicant.
But I did, at the original viewing, think there was something to Rachael's eyes and a red reflection, which they also showed Dekard having. That made me wonder at the time. Researching this just now, Ridley Scott is supposed to have said this was intentional, while Harrison Ford maintains it was an accident of similar lighting, or something.
But anyway, I digress. This image was what really impressed me the most about the film. It was of that giant asian lady's face, on a building made into a billboard basically, while also saying something as it was passed.