Classics you've missed

Uhh my list would be kinda long… it would have stuff like

Gladiator
Citizen Kane
Casablanca
etc etc

All those sort of things because:
A) I never felt the need to watch them (well Gladiator I want to see I just haven’t had the chance yet)
B) I never had the chance to watch them
C) They probably wouldn’t interest me though I might be surprised… (I thought I would hate ‘Life Is Beautiful’ in Italian with Subtitles but I’m loving it so far… we’re watching it in English and get to finish it tomorrow…)