Because you like Amy Pond in Doctor Who
CIA operative Carrie Mathison is on a self-assigned mission to follow a lead, whether it be the truth or just her delusions playing tricks. See them in Homeland.
Keeping your cool is just as useful in the underworld as in war, and Michael Corleone is stone-cold. See them in The Godfather.
In charge of stocking the office's supply of cigarettes and liquor, Joan Holloway could run the whole company if they would let her. See them in Mad Men.
Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .
Leone Montana is a fearless hitman with a surprisingly sensitive side. See them in Leon: The Professional.
With each reboot, Janet progresses more and becomes capable of human emotions. See them in The Good Place.
Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.
Linda Belcher doesn't prescribe to what society deems as "normal." She narrates her life through song, much to the alarm of everyone nearby. See them in Bob's Burgers.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.
Carol Peletier's credo: your strength comes from who you are, not who you used to be. See them in The Walking Dead.
Keren Walker is a socialite looking to avoid work, keep a constant buzz, and be as snarky as possible. See them in Will & Grace.