Because you like Heathcliff in Wuthering Heights
CIA operative Carrie Mathison is on a self-assigned mission to follow a lead, whether it be the truth or just her delusions playing tricks. See them in Homeland.
His elfin self-confidence can border on pretension, but Legolas Greenleaf is a fearsome fighter and a loyal friend. See them in The Lord of the Rings.
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
James Gordon happens to be the one guy in Gotham City with proper morals who doesn't also run around in a cape. See them in DC Extended Universe.
The only thing Albert Wesker cares about is turning himself into a God. See them in Resident Evil Series.
Beneath Arthur's brash demeanor lurks the heart of a compassionate future king destined to unite the five kingdoms. See them in Merlin.
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
The brilliant and well-adjusted Ender Wiggin is being groomed for the next generation of military leaders to fight alien invaders. See them in Ender's Game.
NiGHTS is a powerful but childlike spirit who hates being told what to do. See them in NiGHTS into Dreams.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
Talking to a stranger on a train is the best decision Jesse Wallace ever made. See them in Before Sunrise.