Because you like SHODAN in System Shock
An off-beat dork, John Egbert is funny, inventive, and endlessly optimistic. See them in Homestuck.
Brian Griffin is the most scholarly member of the family—when he's not drunk on martinis. See them in Family Guy.
Sabriel is smart enough to understand the dangers that await her and brave enough to face them anyway. See them in Abhorsen Series.
With his perfectly combed hair and flashy military outfits, France can charm the pants off of anyone—well except his fellow nations, it seems. See them in Axis Powers Hetalia.
Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.
Indiana Jones is a swashbuckling archeologist who hates snakes, Nazis, and priceless artifacts falling into the wrong hands. See them in Raiders of the Lost Ark.
Fox Mulder is a devoted believer in aliens, monsters, and that the truth is out there. See them in The X-Files.
Driven and straightforward with high-technology parts, EVE was sent to Earth to see if it is habitable. See them in WALL-E.
C is for cookie, and that's more than good enough for him. See them in Sesame Street.
Sally Albright is high maintenance who she thinks she's low maintenance. But she's still worth it. See them in When Harry Met Sally....
Carol Aird is driven to fight to make her life better, regardless the consequences. See them in Carol.
Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.