Because you like Lyn Cassady in The Men Who Stare at Goats
Tiffany Maxwell wishes people would stop reminding her about her dead husband. See them in Silver Linings Playbook.
Rukia Kuchiki is a cool and collected warrior who has trouble opening up to anyone. See them in Bleach.
The brilliant and well-adjusted Ender Wiggin is being groomed for the next generation of military leaders to fight alien invaders. See them in Ender's Game.
Ellen Ripley defines the word "badass." When she's not leading her crew on an interstellar voyage, she's slaying terrifying creatures. See them in Alien.
A daring hacker, Trinity is one of the few rebels who escaped the Matrix, a simulation in which most of humanity is enslaved. See them in The Matrix.
Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.
An aristocrat-turned-tomb-raider, Lara Croft does her best thinking while plunging off cliffs. See them in Lara Croft: Tomb Raider.
For Dana Scully, sometimes looking for extreme possibilities makes you blind to the probable explanation right in front of you. See them in The X-Files.
Daria Morgendorffer is so defensive that she actively works to make people dislike her so that she don't feel bad when they do. See them in Daria.
Shaun is used to being lazy. And now, you're asking him to fight for his life? See them in Shaun of the Dead.
V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.
Fox Mulder is a devoted believer in aliens, monsters, and that the truth is out there. See them in The X-Files.