Because you like Khan Noonien Singh in Star Trek Into Darkness

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.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.

Part archaeologist, part philosopher, part politician, Jean-Luc Picard is an unashamed intellectual who runs a tight ship. See them in Star Trek: The Next Generation.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

Leonard "Bones" McCoy is passionate, moral, and ready to stitch you back together. See them in Star Trek.

Greg Lestrade is gruff, loyal, and quietly competent. See them in Sherlock.

A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.

Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.

Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.

Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.

Xander Harris' life motto: laugh in the face of danger and then hide until it goes away. See them in Buffy the Vampire Slayer.

Protecting Earth from mystical threats and training new members, Ancient One has her hands full with her latest recruit Stephen Strange. See them in Marvel Cinematic Universe.