Ok, the films I can watch over and over again, in no particular order:- Platoon, The Shining, 2001: A Space Odyssey, Full Metal Jacket, Star Wars (original trilogy only), Blade Runner, Das Boot, and Goodfellas. I will also watch most of Kevin Smith's stuff (Mall Rats, Clerks etc.), and enjoy some of the "homie" stuff - New Jack City, CB4, and Don't be a Menace....
I realise that a few of you have already said that Blade Runner was not a favourite, but, I think the cinematography (for the time) was just about beyond anything else that came out at that time.