I have to pick two... Both equaly... I consider these to be the two greatest movies of all time... And most of my friends <and even my messed up family> concours hehe.
The Princess Bride... Comeon people... show me a movie with better story telling, romance, action, comedy... Really it hits allmost all points... True love conquers all

The Boondock Saints.... When good irish go bad.. or did they? Yeah, there nuts for becomeing the vengeful hand of god... But comeon... everyone has though of doing it... Wipe out the filth of the earth... The Mobsters and Mafiosos, Murders, rapists and so on... no judge, no jurry. They will send you to any god you choose

And shepards we shal be, for thee my lord for thee. Power decended forth from thy hand, so swiftly shal we cary out thy comand. And we shal flow a river forth unto thee, and teeming with souls shal it ever be. *latin ending prayr that I cant spell*
Its violent, funny, and has more swearing than most can stand... Its freaking awsome XD