Liam Neeson in The GreyTHE GREY

Whenever I watch a movie such as Alive or The Thing or director Joe Carnahan's The Grey - especially in January - I ask myself the same question: Is it worth it? I know about cinematic sleight-of-hand, of course, and that the performers and crew aren't enduring anywhere near the nightmarish conditions suffered by the characters on-screen. I also presume that a fat Hollywood paycheck instantly makes any location shooting, including The Grey's outdoor shoot in wintry British Columbia, a lot more bearable. But still, all that ice and wind and trudging through thigh-deep snow ... . Is any movie experience worth spending three months in fear of losing your digits to frostbite?

Dianna Agron and Alex Pettyfer in I Am Number FourI AM NUMBER FOUR

A handsome, troubled, rebellious transfer student dealing with alienation and the wrath of bullies at his new high school. The kid's ineffectual father, shrugging off his child's loneliness and conflicts with the authorities. The kid's one new friend, a withdrawn, frequently picked-on nerd with his own parental hang-ups. The kid's potential love interest, a pretty, popular girl who feels like an outsider herself, and appears to be the property of the kid's chief tormentor. If you've seen a certain iconic drama starring Natalie Wood, Sal Mineo, and a red-jacket-wearing James Dean, the aforementioned character descriptions might sound a teensy bit familiar.

Jaden Smith and Jackie Chan in The Karate KidTHE KARATE KID

The opening scenes in director Harald Zwart's The Karate Kid remake, with the preternaturally confident and magnetic Jaden Smith taking over the Ralph Macchio role, are really good. But your first indication that the movie might wind up being really great - or, at the very least, a really great time - comes with its introduction of Mr. Han, the Pat Morita substitute played here by Jackie Chan.