Top 10 Sci-Fi Movies?

[CreativeMind]

I'd have to go with the following myself...

1) Star Wars
2) Forbidden Planet
3) This Island Earth
4) War of the Worlds (original)
5) Day The Earth Stood Still (original)
6) The Thing From Another World (original)
7) Them!
8) Aliens
9) The Matrix
10) Wall-E

I agree with others that the problem is how some lines can easily blur. For example, I was tempted to put King Kong (original) on the list, but I actually consider that to be one of the greatest ADVENTURE movies ever made, which happens to have fantastic elements.