Because you like Joan Holloway in Mad Men
Drusilla's hobbies include dolls, music, and killing people. See them in Buffy the Vampire Slayer.
Gregor Samsa is an ordinary man in an abnormal predicament. See them in The Metamorphosis.
Quinn Fabray can become a monster when there is something she wants. See them in Glee.
Breaking bones and hearts, Callie Torres has figured out how to put the bones back together. But the hearts? Not so much. See them in Grey's Anatomy.
His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.
Kenzo Tenma would have never guessed that ten-year-old he saved would later become a deadly serial killer intent on "thanking" him. See them in Monster (TV Show).
If the awesome Andie Walsh is from the wrong side of the tracks, we don't want to be right. See them in Pretty in Pink.
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
Gene Belcher dreams of a future in the limelight, and he doesn't let his lack of talent hold him back. See them in Bob's Burgers.
Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..
It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.