Because you like Violet Baudelaire in Lemony Snicket's A Series of Unfortunate Events
Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.
Mike Ehrmantraut is rutheless, merciless, and probably the most endearing hitman you've ever met. See them in Breaking Bad.
Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.
Celine's a spontaneous Parisian college student enjoying the night of her life. See them in Before Sunrise.
Stranded on Mars, Mark Watney is armed with quick wits, an electronic diary, disco music, and an undying resolve to make it back. See them in The Martian.
Scott Pilgrim's superhero suit is just a video game t-shirt and sweatbands. But this slacker is brave enough to fight all his girlfriend's evil exes. See them in Scott Pilgrim vs. the World.
Accessing more than 10 percent of your brain can do strange things to anyone, and Lucy is Exhibit A. See them in Lucy.
Good fashion? Check. Snarky quips? Check. Supernatural evil-fighting powers? Also check. See them in Buffy the Vampire Slayer.
Korra is stubborn, outgoing, and faced with huge responsibilities she might not be ready for. See them in The Legend of Korra.
While Alan Garner is loyal to his new friends, his efforts to help them often do more harm than good. See them in The Hangover.