I ab-so-LUTE-ly can't pick one. No way, no how. So like IrishJedi, I'll have to claim a tie, with all of these in the #1 spot (repeats to some that others have already listed, but this is MY list):
1. All About Eve
1. Shawshank Redemption
1. Alien
1. Double Indemnity
1. Blade Runner
1. Rear Window
1. Star Wars original trilogy
1. Raiders of the Lost Ark
1. Lord of the Rings trilogy
1. The Thin Man collection (ALL of them!)
(Yes, putting the 'trilogies' and 'collection' up is even more of a cheat than putting more than one movie as my "all time favorite" but hey, as I've stated, it's MY list!)
The nice thing about putting only number 1's is that I can add to the list in any order without changing any of the numbers!!
Seriously, my list of 'favorite all-time movies' is much too lengthy to post (and I haven't even TOUCHED on Astaire and Rogers movies and have given barely a nod to Hitch****'s films.) There are just waaaaaayyyy too many, but I would have to say those above are the ones that have the most repeat 'viewability' for me. These are the movies for which I will stop flipping tv stations to watch, commercials and bad screen cropping and all, only to have my husband walk in and say "You know we HAVE this on dvd!".
NOTE: So for some reason I can't type the cinema master's name of Hitch**** without it giving me asterisks? Go figure...