Blade Runner is such a good film on so many levels, The mixing of Film Noir and Scifi Genres, the set designs, the future looking so Bleak are just a start. It works on so many levels for each different version, and the arguments about if he is a replicant or not will go on to the end of time, Ridley Scott says yes deffo, but academics and Film journo's say no. I'm still undiceded.
The pace is very different from a lot of Modern films but works so well and Roy Bateys lines at the end are inspiring.
All the different cuts add there own level of argument to the film, (Just cut of the Tacked on Car ending of the theatrical cut), and its so in depth. Not a film you can watch while doing other things. Darken the room, turn the volume up and watch, as others have said, you often see new things on repeat viewing.
On the talk of Pulp fiction, what makes it so good is the way that Tarrentino Plays with the Narritive structure of the film, changing the viewers perceptions, the dialogue and characters and how they are explored all make it a great film.