Because you like Gabriella Montez in High School Musical
Cosmo Kramer is an eccentric schemer whom you might know better as the "Assman." See them in Seinfeld.
With his own ship, Peter Quill calls his own shots, and gets to fly from planet to planet blasting '70s pop hits and picking up alien chicks. See them in Marvel Cinematic Universe.
Annie Walker can bake a beautiful cupcake, but everything else in her life is a mess. See them in Bridesmaids.
Petyr Baelish's main assets? A sharp mind, deep pockets, and no scruples. See them in Game of Thrones.
Rick Sanchez is a gruff, alcoholic mad scientist, with the emphasis on "mad." See them in Rick and Morty.
Guillermo is the best servant a vampire could ask for. For years now. Not that he's counting. See them in What We Do In The Shadows.
Orphan Bruce Wayne has a tortured soul, but he's trying his best to weed out corruption. See them in DC Extended Universe.
Liv Moore is a sarcastic high-achiever turned morally conflicted zombie. See them in iZombie.
Simba just can't wait to be king, but he's got a lot of growing up to do first. See them in The Lion King.
Juliet Starling is a cheerleader by day, gleefully unhinged zombie killer by night. See them in Lollipop Chainsaw.
Shana is a red-haired warrior with a black-and-white worldview. See them in Shakugan no Shana.
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.