Because you like Winston Bishop in New Girl

Dimitri Belikov is a stoic vampire guardian who has the reserve, focus, and discipline of a soldier. See them in Vampire Academy .

Just a hint of human emotion lurks under the enigmatic exterior of Rei Ayanami. See them in Neon Genesis Evangelion.

The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.