Because you like Twilight Sparkle in My Little Pony
Joel is a hardened, jaded survivor who keeps finding things to fight for. See them in The Last of Us.
Fiona Gallagher wants to be able to give her siblings everything that they deserve because her parents aren't going to do it. See them in Shameless.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.
Unaware of the fact that he's a toy and made of plastic, Buzz Lightyear is a spaceman on a mission fully of snappy catch phrases. See them in Toy Story.
Steven Universe is an excitable youth who likes junk food and trying to save the world. See them in Steven Universe.
Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.
Good-natured, sensitive, and introspective, Mason is on a lifelong path to finding himself. See them in Boyhood.
Buttercup is a farm girl turned princess who'd do anything to have her old life back. See them in The Princess Bride.
A weather-controlling mutant, Storm doesn't just use her powers to ruin Magneto's day with unexpected showers. She is truly a badass. See them in X-Men Series.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.