Let's see if i can get them all down. Here they are:

GF2
Goodfellas
Casino
Raging Bull
New York, New York
King of Comedy
Mean Streets
Cape Fear
Taxi Driver
Bang the Drum Slowly
1900
The Deer Hunter
True Confessions
Once Upon a Time in America
Falling in Love
The Mission
The Untouchables
Angel Heart
Midnight Run
We're No Angels
Awakenings
Backdraft
A Bronx Tale
Mary Shelley's Frankenstein
Heat
Sleepers
The Fan
Jackie Brown
Cop Land
Ronin
Flawless
Analyze This
Men of Honor
Meet the Parents
The Score
15 Minutes
Showtime

Wow!!! 37 De Niro movies. I didn't realize until now that i've seen so many. I don't think i've watched as many movies for any other actor. That just tells you why he's my fav actor.