Well, I really like Blade Runner. I like noir if one means Out of the Past, The Third Man, The Big Sleep, etc., but not a fan of the B-movie genre as a whole.
As sci-fi noir, I thought Harrison Ford played Decker just right. It's not a glamorous lead role. Rutger Hauer steals the show in that degree, but that is fitting, as the redemptive thematic moment belongs to Roy Batty. I agree the director's cut is far preferable, though I have some nostalgia for the voice over version and don't absolutely hate it.
I rarely go see movies at the theater. The Artist was the last one, so you see how infrequent. I think I'd like to see the new Blade Runner on Imax, though.
The whole question of identity and the mix of interesting philosophical/theological questions with a rich, dystopic mythos makes the original and sequel worth contemplating.
Blade Runner is based on Philip K. Dick's Do Androids Dream of Electric Sleep, so the speculation regarding the future was further out than the film date might lead one to surmise.
Anyway, I know quite a few folks who think it dull and I can understand how they find it so (I find David Lean films dull, though they are cinematic masterpieces I suppose.)