Your top sci-fi of the 90s?
I'm thinking Gattaca, purely based on complexity of characters and structuring of the script would be my #1 of the decade.
My top ten would be
Gattaca
Strange Days
The Matrix
Cube
Ghost In The Shell (the Japanese version with subs)
Terminator 2
Jurassic Park
Tweleve Monkeys
Open Your Eyes (with subtitles)
The Truman Show