12 (or twelve) Monkeys is one of the most subtle and effective sci-fi movies ever made. You truly have to watch it 2 or 3 times to realize there are clues scattered throughout the film that this is not the first time this adventure has happened to these characters. Brilliant script and acting.
2001 is a favorite that I regard as a great film with great flaws. But it's best moments outshine the worst. The opening with the apes is a bit much.
I'll go on record as the first to say I enjoy BOTH versions of "The Thing". I look forward to the prequel. The original is unique unto itself, and the remake is one of the darkest, most claustrophobic, utterly paranoid films ever made. Not to mention it's full of shocking special effects.
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I wake to sleep, and take my waking slow. I feel my fate in what I cannot fear. I learn by going where I have to go. ~Theodore Roethke