Well for me personally, when I first saw it as a kid, I'm not sure I finished it (I think I nodded off waiting for something to happen, possibly because I was expecting a sci-fi action flick). However revisiting it years later, I fell in love with it (particularly the Final Cut). I think in honesty, I didn't quite understand it the first time around. Then again, tastes change as you get older; in example 9 year old me would have rated 'Aliens' as my fave flick followed by 'Alien 3' and 'Alien' last... adult me puts that list in reverse order... so yeah.
Blade Runner was a snooze fest on first viewing. Now? I could watch it on repeat. (Just watched a copy of the theatrical cut I got on 35mm last week). I own every comic book, all the novels, binged Black Lotus on release, had 2049 on pre-order, can't wait for the new TV series, I'm working through the 'Do Androids Dream of Electric Sheep' comics /graphic novels - and have started a play though of the 1997 point and click game. Can't get enough of it. I think it's one of those movies that is often misunderstood on first viewing.
It's up there with the Ghost in the Shell franchise for me.
EDIT: It's worth noting, one of the nicest ways to watch Blade Runner (to me) is the fan released 'Penultimate Cut' - basically it's the Final Cut, but with the original colour grading restored(more brown tones than the new blue/teal presentation) and all original effects have been restored (minus the strings on the spinners)
Trailer:
https://youtu.be/nsdmYjF_064?si=DpkdIDdfwBaJ2l9O