Because you like Hikaru Sulu in Star Trek
A bumbling hobbit, Bilbo Baggins is becoming a part of something much larger than himself as he embarks on a quest. See them in The Hobbit: An Unexpected Journey.
A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.
Howard Wolowitz is an engineer whose serious mommy issues somehow haven't dimmed his confidence. See them in The Big Bang Theory.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
A blood-thirsty warrior on the battlefield, Ragnar Lothbrok is a dedicated family-man at home. See them in Vikings.
The fearless bodyguard of Rick Flag, Katana will ruthlessly kill her enemies, trapping their souls in her sword. See them in DC Extended Universe.
Macbeth was probably named "Most Likely to Kill His Rivals" in his senior yearbook. See them in Macbeth.
Derek Morgan is thoughtful and kind, but he won't say no to knocking the occasional door down when he gets the chance. See them in Criminal Minds.
Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.
Point the fun-loving Pippin Took towards second breakfast, and he's one happy hobbit. See them in The Lord of the Rings.
A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.
