Because you like Killer Croc in Suicide Squad
A believer in the pursuit of justice, Garrus Vakarian hates it when bad guys slip through the cracks of the bureaucratic justice system. See them in Mass Effect.
Lying is the most fun a girl like Alice can have without taking her clothes off. See them in Closer.
Donna is boisterous and spunky traveller of the TARDIS, exploring worlds beyond the simple mundane enterprises of Earth. See them in Doctor Who.
Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.
For Celty Sturluson, it's rather upsetting to be the only headless girl in a city filled with full-bodied humans. See them in Durarara!!.
A superpowered test subject, Scarlet Witch can manipulate other people's thoughts and force them to confront their worst fears. See them in Marvel Cinematic Universe.
Hawkeye is most comfortable perched above the action, keeping an eye on everything and using a well-timed arrow to save the day. See them in Marvel Cinematic Universe.
Introspective Theodore Twombly would rather observe life than participate in it. See them in Her.
This thrill-seeking driver lives by a very particular moral code. He stands by his word and he's loyal to a fault. See them in Drive.
Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.
Mr. Robot always seems to know what to do when others are lost. But can he be trusted? See them in Mr. Robot.
As the unit chief of the FBI's Behavioral Analysis Unit, Aaron Hotchner is dead serious about avenging dead people. See them in Criminal Minds.