See, Windtalkers for me falls into that category of "So bad it's good." Partially because of Nicolas Cage Nicolas Caging all over the screen, but also because it's so clearly a by-the-numbers war movie. What's that otherwise nameless squaddie? You're gonna go back home after the war and start a yoghurt business with your best girl? That's cute, because now WAR MOVIE LAWS DICTATE THAT YOU DIE.
If I've learned ANYTHING from war and cop movies, it's this: NEVER talk about what you're gonna do when you retire or after the war. Never mention how many days you're short or until your retirement. Don't talk about how you'd like to visit a place you've never been to, ESPECIALLY if it's Montana. Don't talk about how you're gonna start a business doing XYZ when you get home.
You wanna survive a war movie, you follow the wisdom of one Lt. Ronald Spiers and recognize that you are already dead. You do not have a future, so musing about what you'll do later is pointless.
You can apply similar teachings to Joss Whedon shows, where the two safest paths are to never fall in love, and never actually be happy or have life going well for you. If either of those happens, watch out, because the Hand of Joss will surely smite you. Also, don't become an audience favorite. You'll live longer, even if you get less screen time.