Because you like Lester Freamon in The Wire
Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.
A gifted detective, Rust Cohle is as dark and twisty as any murderer he chases. See them in True Detective Season 1.
Mike Ehrmantraut is rutheless, merciless, and probably the most endearing hitman you've ever met. See them in Breaking Bad.
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.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
Chicken resterauntier by day and drug overlord by night, Gus Fring doesn't let the stress of living a double life get to him. See them in Breaking Bad.
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.
A poised, stately man-out-of-time, Ichabod Crane typically faces the modern world with wry quip. See them in Sleepy Hollow.
Chef is a swinging bachelor and former R&B singer with a leopard-skin upholstered couch and some great stories. See them in South Park.
Extremely violent and loyal, Sandor Clegane is called the Hound for a reason. See them in Game of Thrones.
Angela Martin is uptight and puritanical, outside of the affair she's having with a co-worker. See them in The Office.
Let's just say Sheldon Oberon is having an out-of-body experience like no other. See them in Jumanji.