Because you like Don Draper in Mad Men
Southern belle Scarlett O'Hara is a heart-melter who has no problem looking after herself. See them in Gone with the Wind.
Olive Hoover is an irrepressible child beauty queen (or would-be queen) who doesn't play by your rules. See them in Little Miss Sunshine.
Faith has a chip on her shoulder and a stake in her hand to slay vampires in her town. See them in Buffy the Vampire Slayer.
Good-natured, sensitive, and introspective, Mason is on a lifelong path to finding himself. See them in Boyhood.
Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.
Kumar Patel is always high, always hungry for sliders. See them in Harold & Kumar Go To White Castle.
It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.
Aldo Raine is in the killing Nazi business. And as he says, business is a-boomin'. See them in Inglourious Basterds.
Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.
James Gordon happens to be the one guy in Gotham City with proper morals who doesn't also run around in a cape. See them in DC Extended Universe.
Audrey Horne may seem inquisitive and charming, but she can turn on a dime. See them in Twin Peaks.
Peter Kavinsky is a jock who only cares about getting back at his ex, or so he says. See them in To all The Boys I've Loved Before.