Because you like Leonard "Bones" McCoy in Star Trek

Leonard Hofstadter is the normal one among his scientist friends, though in fairness that's a low bar. See them in The Big Bang Theory.

Rory Williams is a caring companion whose specialty is looking after others. See them in Doctor Who.

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.

Honest, true, and just, Ned Stark is a good man. Unfortunately, those traits are not assets in Westerosi politics. See them in Game of Thrones.

Oscar Martinez is a national accountant in an office of weirdos. See them in The Office.

Davos Seaworth is steadfast, intelligent, and trustworthy, which are hard traits to find in a place like Westeros. See them in Game of Thrones.

His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.

Bodhi Rook is a defected pilot for the Galactic Empire dead set on destroying the Death Star. See them in Rogue One.

Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.

It's impossible to say whether Winifred Burkle is cuter than she is smart, or vice versa. See them in Angel.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

David Nolan is a noble fairy tale prince with the heart of a hero, regardless of whether he can remember his past or not. See them in Once Upon a Time.