Favorite Science Fiction Movies

[Scifiguy]

I love Science Fiction, and there is no end to what I like in that subject area. But what is your top five Science Fiction movies and why? I have an endless list but if I had to name five which I am, then they would be. 

1. Star Wars the first one.
   
2. Star Trek the Wrath of Khan.
   
3. Close Encounters of the Third Kind.
   
4. Blade Runner the original one with Harrison Ford.
   
5. Heavy Metal the 1981 cartoon. Saw it at the drive in, and it blew my mind.
   

So what are yours?

[FalconFX Studio]

For me there are a lot of choices as the genre is so broad. However, I would say my quick list would be.

Cloud Atlas, I think this is one of the best movies I ever seen.
Aliens - The second movie.
Star Wars, the Empire Strikes back.
Star Trek The Wrath of Khan. Nice choice on that one @Scifiguy.
The Martian with Matt Damen. I like it as it is just so well done.

I agree also with you when you said you have an endless list. There are so many honorable mentions.