The ultra-dramatic back-shot, for the lonely hero and probably vigilante. If he's wearing a hat, he definitely has a concealed weapon. If not, it's a toss-up.
Movie posters about animals tend to be sapphire. There's also all that thin, white text in capital letters, and often pairs of figures in profile or from the back. And hey, a huge white moon can't hurt.
Photobooth faces with overlaid text denotes that the main character is the most important thing in the film, and they're probably super awesome.
A silhouette in front of the ocean, with faces floating in the clouds, all in pastel colors? This movie will be really touching and poignant, you guys.
Any black and white poster with a shock of red flame is trying to tell you it's an action flick, and that you can expect more than four explosions…
… whereas the black and white with red block text is more comic book-esque, high style with a weaponry focus.
If someone is running down the street, that street should probably be blue. Also your movie should probably be some kind of thriller.
We happen to like most of these — posters dominated by faces created out of film elements — but you can't deny that seeing them all lined up like this takes a little of the air out of them.