Because you like Drusilla in Buffy the Vampire Slayer
Walter White's knowledge of chemistry allows him to cook astoundingly pure meth, leading to a rapid – albeit tumultuous – rise in the criminal drug world. See them in Breaking Bad.
Aldous Snow is a rock star who plays hard and parties harder. See them in Get Him to the Greek.
Because of Miles Edgeworth, the truth will always make itself known. See them in Ace Attorney Series .
Yoda is wise, patient, and capable of kicking ass. He's done his best to mentor young Jedi and protect the balance of Light and Dark. See them in Star Wars Series.
Edward Elric has a quick mind along with a quick temper. See them in Fullmetal Alchemist.
The son of Death has an obsession with perfection and symmetry. See them in Soul Eater.
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.
Tidus is upbeat, carefree, and desperate not to become his father. See them in Final Fantasy Series.
Everyone Barney Stinson knows is getting married or pregnant. But he's just getting more awesome. See them in How I Met Your Mother.
L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.