Because you like Estelle Costanza in Seinfeld
Will Byers is just like any other twelve year old, except he's stuck in another dimension. See them in Stranger Things.
Mabel Pines loves sparkles, animals, friendship, and fun. See them in Gravity Falls.
Jackie Burkhart is a privileged princess with a healthy dose of self-confidence. See them in That '70s Show.
George Weasley likes to invent quirky joke products, play Quidditch, and cause poor Mrs. Weasley a lot of anxiety. See them in Harry Potter Series.
England may cultivate the image of a well-bred gentleman, but he has both the temper and mouth of a seasoned sailor. See them in Axis Powers Hetalia.
For Wreck It Ralph, it's not easy being the bad guy. Especially when you've been designed to destroy but really desire love. See them in Wreck-It Ralph.
A master manipulator, Frank Underwood has a tight grip on Washington DC. Plus who doesn't like having a leader who frequently tosses off Shakespearean asides? See them in House of Cards.
A machete-wielding mass-murderer, Jason Voorhees is a terrifying blank slate. See them in Friday the 13th.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Leonard Hofstadter is the normal one among his scientist friends, though in fairness that's a low bar. See them in The Big Bang Theory.
Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.