Because you like Megan Price in Bridesmaids
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Helena is a mentally unstable, childish, and completely merciless. And most of all, she's an unstoppable killer. See them in Orphan Black.
Nate Archibald is confident, shrewd and trying to do the right thing. But that isn't always easy on the ruthless Upper East Side. See them in Gossip Girl.
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.
Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.
Macbeth was probably named "Most Likely to Kill His Rivals" in his senior yearbook. See them in Macbeth.
Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.
Rachel Goldberg is a drama-causing reality TV producer with the power to ruin people's lives at the click of a button. See them in UnREAL.
Cady Heron is the new girl in town who's also new to the world of high school, period. See them in Mean Girls.
Sometimes being a supportive girlfriend like Ophelia doesn't work out too well. See them in Hamlet.
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.