Because you like Sebastian Valmont in Cruel Intentions

Ron Swanson is the man's man's man's man. See them in Parks and Recreation.

Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.

Mikasa Ackerman is a near-perfect soldier who won't break her stone-faced expression whether she's killing foes or protecting loved ones. See them in Attack on Titan.