Top 5 sci-fi movies?

not sure if this has been done on here
here are my top 5 sci-fi movies in no particular order:

signs
the thing
avatar
star wars / trek
solaris (2002)


feel free 2 post ur top 5 / what am I missing

keep in mind I may not be as old as most of u

I was thinking ID4 and They Live...

I dont do much sci fi so these 2 are good..

Avatar, I dont know.. it was more politically directed at todays events than anything I think..

Brazil
Logan's Run
Blade Runner
The Running Man
Star Trek First Contact

Oh yes independance day & blade runner r very good thxs

Blade Runner.
The first Matrix.
Dark City.
Equilibrium.
Empire Strikes Back.

Just adding that If you watch Dark City and Equilibrium that pretty much gives you the first matrix, and done better imo so I could remove the matrix and add any of the following in its place Serenity, T2, Aliens, maybe even the Abrams Star Trek reboot and Tron Legacy which i really enjoyed as well.
In no particular order.

Tough one - my all time favorite is probably Serenity, as for top 5? I would have to have a good think about that one. Will get back to you.

In no partiular order:

Serenity
Eden Log
Sunshine
Pitch Black
Children of Men

havent seen dark city in awhile / gonna watch that again soon
thxs 4 that 1

Alien

Aliens

The Terminator

The Matrix

Inception

in no particular order.

contact another good 1
thxs 4 that 1

In no particular order:

Fire in the Sky

Starship Troopers (only the first one)
Star Wars Episodes 4,5,6 (obviously)
Dune (the old one with Patrick Stewart)
Event Horizon (sci-fi horror but so EPIC)
The Matrix (only the first imo)
Terminator 2
Aliens
Some runners up: Impostor, The Fifth Element, Hitchiker's Guide and The Guyver

2012 Ice age...Awesome movie, with over the top effect and a catching story....Must watch

2nd Nice weather here

in no order

pi
primer
a scanner darkly
paris 2054 renaissance
blade runner

1. 2001
2. Inception
3. Aliens
4. Abyss
5. Minority report


Runner ups: contact , Matrix, T-2, close encounters of the 3rd kind, star wars empire strikes back.

Top 5 is hard.

Some of my favs that haven't been mentioned would be

Moon
THX-1138
Soylent Green
Timecrimes
Invasion of the body snatchers (both versions '56 & '78)
Gattaca
Contact
Total Recall
The Fly
The Fountain

Top 5 is realy tough to choose from so many greats.

1, metropolis, still as relevent and important a movie as when it was made in 1927

2, Alien, gritty, great visual style and fantastic story, and the best monsters in movie history

3, Blade runner, deep complex diologue, amazing visuals and compelling characters/story.

4, Akira, cyberpunk sci-fi at its finest and very influential anime movie.

5, Terminator, all round great movie.