Because you like V in V for Vendetta
It's hard enough fighting a war. But it's worse for Commander Shepard, knowing no matter how hard you try, you can't save them all. See them in Mass Effect.
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.
A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.
Bad-ass Rayne has sworn her life to finding and destroying her vampire dad, Kagan, and killing as many other vampires as she can in the bargain. See them in BloodRayne .
An infamous vampire, Alucard is a one-man killing machine with a philosophical side. See them in Hellsing.
Stoic, cynical, and brilliant, Solid Snake was genetically engineered to be the perfect soldier. See them in Metal Gear Series.
Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.
Society may reject Felicia, but this bubbly catwoman just wants to spread happiness to others. See them in Darkstalkers .
Hans Landa doesn't seem to have issues with Jews, but he hunts them because he's determined to do his job well. See them in Inglourious Basterds.
Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.
An assassin with supernatural gifts, Corvo Attano is the last guy you should frame for murder. See them in Dishonored.