OK, I'll give this a shot. In no particular order:
Memento: The movie. Is backwards. That's just awesome.
Batman Begins: Looking back....I think I enjoyed this more then The Dark Knight. Maybe. I know I'm in the minority on this one, but...Fuck it, that movie kicked ass. Great origin story, with about 10 thousand different metaphors and recurring symbols skillfully woven in to the fabric of the whole movie.
Inception: Well, among (lot's of) other things, THEY BUILT A SPINNING HALLWAY. Again, that's just awesome. (Gee, AM I Christopher Nolan fanboy? I hadn't noticed.)
The Prestige:The movie is set up like a giant magic trick, which is awesome. Plus, he does really cool things with respect to the two main leads, which I won't spoil here. But it's really fucking cool.
The Dark Knight: Mainly because it's very well-written and Heath Ledger is was a badass.
V For Vendetta: Brilliantly written and executed. V is one of the best characters of all time. And I'm always a fan of Natalie Portman.
Toy Story 3:Oh, you know. It's fucking Pixar. Plus, I actually went to college about a month after seeing this movie, so this movie was basically MADE for me and people my age. And I appreciate that.
District 9:Blistering action, great characters(the Prawn beat the SHIT out of the Navi.) and deep political undertones. Seriously, where the fuck is "District 10"? TELL me you wouldn't watch that.
Black Swan: Very, VERY well done movie. Natalie Portman's best performance ever, and...well, come on. She makes out with Mila Kunis. It had to be said. Seriously, though, great movie.
Gangs of New York: BILL. THE MOTHERFUCKING. BUTCHER. Seriously, go watch this movie. It's one of the most epic things I've ever seen. You will NOT regret it.
Honorable Mentions go to:
Moon
The Simpsons Movie
2001: A Space Odyssey
Insomnia
Full Metal Jacket
Die Hard 1
Die Hard 4
A Beautiful Mind
Signs (Yes, Signs)
Shawshank
Dr. Who: The End of Time (totally counts)
Red Vs Blue: Revelation (Again totally counts)
Watchmen
Aaaaaaand.....Yeah. That about covers it.