The Abyss
Watching it again, I sort of wish that they had spent more time developing the alien part of the story, as it kind of comes off as a bit gimmicky. However, the visuals and the cinematography are still quite lovely to watch. I saw the original cut instead of the director's cut, and thankfully it didn't have the lame anti-war/violence message at the end.
Blade Runner (The Original Cut)
I've now seen the Original and Director's Cuts of this movie, now I'm curious to see the Final Cut, which I hear is fantastic. Anyway, having seen the film before, I knew what to expect from it, and I think it helped me to better appreciate it. Upon my first viewing, I was expecting something a bit more action-packed to go along with the great visual effects the film boasts, but now that I knew what to expect, I was better able to pay attention to the thematic elements of the film and its meditation on the nature of humanity. Plus, the 'film noir' style of the movie is also pretty cool.
The look of the film is absolutely fantastic. I love the art direction, cinematography, and visual design, which is perfectly complimented by Vangelis' great musical score.