In 7 words or less: Cooped-up men get really, really paranoid.
Best bits? Stand out scenes include the 'hot wire blood test' scene and the head turning into a spider (an image which haunted me as a kid) plus all of the monster effects.
Did it make you think thoughts? Nice comfy, wintery thoughts of log fires and snow. It also always amazes me how frightening the monster is in this film. Physical effects forever, I say.
Would you watch it again? And again and again and again.
Rating (out of 100%): 90% John Carpenters best work and one of the best monster movies of all time (as of 2011).