Because you like A.J. Soprano in The Sopranos
Merlin is half awkward teenager, half super-powerful wizard. He serves Prince Arthur of Camelot during the day and illegally learns magic at night. See them in Merlin.
The ever-cheerful Tonks can change her appearance at will, but she can't seem to get rid of her clumsiness. See them in Harry Potter Series.
Violet Parr is an angsty teen would love to become even more invisible than her superpowers allow. See them in The Incredibles.
The crown prince of the Fire Nation, Zuko has been ordered by his father to find the long-lost Avatar before he is allowed to return home. See them in Avatar: The Last Airbender.
April Ludgate doesn't like sunshine. She's more of a blood and guts kinda girl. See them in Parks and Recreation.
Lucius Malfoy is a judgmental social climber who has a bigoted superiority complex. See them in Harry Potter Series.
Will Turner is an earnest, lovelorn blacksmith's assistant with an adventurous spirit. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
A singing nanny, Mary Poppins is practically perfect in every way. See them in Mary Poppins.
High school is Hell, so Allison Reynolds spends her time giving herself tattoos with ballpoint pens and shaking dandruff out of her hair. See them in The Breakfast Club.
Harry Osborn is the privileged son of Oscorp's founder with a goblin-sized chip on his shoulder. See them in Marvel Cinematic Universe.
A secret smoker, Margot Tenenbaum has plenty more secrets where that came from. See them in The Royal Tenenbaums.