Is this limited just to horror? If so, I haven't seen many I really, really enjoyed this year. At least, none that are coming to me. Some non-horror flicks I think are worth checking out:
Horrible Bosses -- this flick is FUNNY. I laughed outloud frequently throughout and am kinda crushing on Jennifer Aniston now.
I Saw the Devil -- wow, what a great flick. Brutal as hell and even moving.
Captain America: The First Avenger -- best superhero flick of the year, and IMO the best superhero flick since the first Iron Man
The Whistleblower -- very good flick, but it will piss you off. Nevertheless, recommended.
Another Earth -- a deeply philosophical and meditative flick. If you like an intelligently told story, check it out.
The Interrupters -- VERY good documentary about ex-convicts who walk the streets of Chicago hoping to educate young gang members. The ex-convicts AND the documentary crew find themselves in some pretty hairy situations, and when you see this flick you'll compliment both their intent and their bravery. Gut-wrenching parts, but a fantastic documentary on urban warfare.