Moviefone's Top SciFi Movie Picks
Personally I prefer to break up my ranking of science fiction films into three categories: Classic Science fiction (pre-1970), Modern Science Fiction (70s-Present), and Parody Science Fiction. That said, I think they missed out on some films but its hard to tell whether the list was based on favorites or films that impacted the genre and brought something new to SF in their time. Some did both, but a number listed really did neither.
I've never seen Metropolis though I would love to. I'm sure it would fall into my top 10 classic SF category along with the original The Day the Earth Stood Still, which is still my favorite classic SF film, followed closely by 2001: Space Odyssey.
I'd have to say I agree with their pick of Blade Runner for my favorite modern SF film, though it is close with the original Star Wars movies, ST2: The Wrath of Khan, Matrix trilogy, and the tech-noir film, Hardware.