Movies that changed my life:
-Apollo 13
-Pursuit of Happiness (anyone who's every discouraged should watch this)
-Citizen Kane (one of the best movies ever made, period)
-The Pianist (one of the most realistic depictions of the effects of war)
-It's a Wonderful Life
-Saving Private Ryan
-Shawshank
Movies that were a blast to watch or you should probably see:
-Raiders of the Lost Ark (one of the all-time classic action movies, of all time)
-Memento
-Blues Brothers (one of the best satirical comedies ever made)
-Inception
-Schindler's List
-Lord of the Rings Trilogy
-The Matrix
-Toy Story (1 or 2, although you need to see 1 to see 2)
-The Incredibles
-Shutter Island
-The Dark Knight #1 and #2
-Alien (and Aliens.. both classics)
Films everyone else says you should watch, but I didn't understand at all:
-Apocalypse Now
-A Clockwork Orange
(they both seem like violent pipe dreams)
Feel free to take whichever one. Hopefully the list will inspire some other people.