Movies with great endings...

I'm gonna go home and sleep with my wife.

No kidding-I was crying in such a state that I had to be helped from the theatre.

I really liked the ending to Match Point. Quite unexpected.

And I always enjoy watching the whole pick up the drugs drop off the silencers while my brother is making sure the sauce doesn't burn sequence to Goodfellas. Not actually the end, I understand but it's a mob movie ending with Sid Viscious' version of an old mob hit to make up for my comment.

American Beauty
KPAX
Usual Suspects.... Basically anything involving Kevin Spacey

And The Life of David Gale
Shawshank Redemption
Se7en
Pay it foward.... Again Kevin Spacey

Eternal Sunshine of the Spotless Mind
Sin City
Bonnie and Clyde

And no I am not a Kevin Spacey fanboy.

Night of the Living Dead and Lost Boys

I have a love for steel trap endings.