That everyone just assumes that everyone else has seen.
In alphabetical order.
Fast Times at Ridgemont High
Field of Dreams
Good, the Bad and the Ugly,The
It's a Wonderful Life
Matrix, The *
There will be Blood **
Top Gun ***
Also, I have never seen anything with Bruce Lee, Only one Dirty Harry movie, and only one James Bond (During high school, my friends and I would go see whatever happened to be playing at the $!.50 theater. That is how I saw "Octopussy," which killed any interest I might have had in seeing any other of the Bond series.)
* I saw a couple of scenes when my friend was showing off his fancy newfangled DVD player. They were awful.
** I know this got great ink, but I hated Magnolia, I wa underwhelmed by Boogie Nights, and I'm just not that eager to sit through, what is it, like 3 1/2 hours to give Paul Thomas Anderson a third strike.
** * I did see part of this at a friend's house. I fell asleep. I don't think I missed much.