Your top three Matt Damon performances
Good Will Hunting
The Departed
Invictus
Geez these are hard threads lol!
He's had so many good movies but you ask about favorite performances so:
The Informant
Behind the Candelabra
The Departed
Rounders
The Martian
Good will Hunting
Excellent picks. Out of the titles that have not been mentioned so far:
Dogma
[spoiler]Interstellar[/spoiler]
The Adjustment Bureau
One of my favourite low key dirty gags ever:
https://youtu.be/z5QNfzrolyc?t=35