Because you like Danny Zuko in Grease

Michael Bluth is the only sane person in a family of eccentrics. At least, that's how he thinks of himself. See them in Arrested Development.

After several hundred years of shutting himself out from the rest of the world, Japan's not used to dealing with nations, See them in Axis Powers Hetalia.

We're all puppets. Dr. Manhattan is just a puppet who can see the strings. See them in Watchmen.

Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.

A resourceful ship systems engineer, Isaac Clarke does his best to batttle the infection spreading across space. See them in Dead Space.

Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.

Jim Halpert is a master at the art of making it through the work day, including participating in an office Olympics. See them in The Office.

Intelligent and compassionate, Hazel Lancaster would rather face things, even bad things, than sugarcoat the truth. See them in The Fault in Our Stars.

Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.

Steven Universe is an excitable youth who likes junk food and trying to save the world. See them in Steven Universe.

Leonidas is not the kind of king who merely gives orders; rather, he's out on the battlefield fighting alongside his men. See them in 300.

Both intelligent and empathetic, Remus Lupin is worn down by the weight of a secret. See them in Harry Potter Series.