" Leave the gun, take the cannolis" - The Godfather. Close second " I made him an offer he couldn't refuse".
 
Rocky

"Someone once told me that time was a predator that stalked us all our lives. But I rather believe that time is a companion who goes with us on the journey, and reminds us to cherish every moment because they'll never come again. What we leave behind is not as important as how we lived"
 
Jean Luc Picard - ST generations

bitflipper
All those moments will be lost, in time, like tears in rain. Time to die.

You beat me to it bit...
 
I always shed a tear at this point in Bladerunner...

"Gentlemen, you can't fight in here! This is the War Room!"
 
For Bit et. al. 

"Badges, to god-damned hell with badges! We have no badges. In fact, we don't need badges. I don't have to show you any stinking badges, you god-damned cabrón and chinga tu madre!" from B. Traven's novel The Treasure of the Sierra Madre (1927)
 
"Badges? We don't need no stinkin' badges!" from Blazing Saddles

"KUMBAYA!"
 
-Kevin, Bob, Stuart and about 200 others...  MINIONS
 

 
that was an AWESOME movie, BTW!  the music and musical references in the movie were worth the price of admission!

"They're under the gall-dang ground!"
 
Kevin Bacon - Tremors

bitflipper
All those moments will be lost, in time, like tears in rain. Time to die.
... 

 
With fabulous music by Vangelis in the background, and tears on Roy's face ... and Decker stunned!
 
One of the prettiest moments in film I have ever seen. So beautifully done, and so poetic!
 

"Hey, it's me, Dave! Let me in! The cops are coming!" 
and the quote...
"Dave's not here."

"If she weighs the same as a duck she's made of wood and therefore A WITCH!"  
Monty Python and the Holy Grail