Star Wars (All 6 of them, definitely classics.)
The Lord of the Rings (All 3, though TTT was changed too much)
Indiana Jones (1 & 3, 2 was a little lame in parts; haven't see 4 yet)
Pirates of the Caribbean (All 3, though the 2nd was a bit slow)
Patton (Greatest war movie ever)
The Battle of Britain (Second greatest war movie)
Tora, Tora, Tora! (Pure WW2 awesomeness)
Iron Man (Great movie, though I didn't like the anti-war propaganda)
Master and Commander: The Far Side of the World (Great movie.)
The Matrix (Only the 1st, kind of weird, but awesome once you figure out what's happening.)
The Mummy (Awesome movie. Good mix of story, action, and horror.)