Angelus said:
Gladiator
Robin Hood: Prince of Thieves
The Departed
Django Unchained
Lord of the Rings Trilogy (this might be cheating, but like the Mass Effect trilogy in gaming, I simply view these as parts of a whole)
Die Hard
The Dark Knight
Casino Royale
The Matrix
Rush

Outside of Gladiator, which is in fact my favorite, these aren't in any particular order. Narrowing it down to 10 is insanely hard though. There's so many fantastic movies. I could do honorable mentions for days

You appear to have great taste in films, since this is my top film of all time too, lol :P