Because you like Sam Fisher in Tom Clancy's Splinter Cell
Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.
Altair Ibn-La'Ahad is as much a philosopher and detective as he is a killer. He takes nothing at face value and continually searches for deeper truths. See them in Assassin's Creed Series.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.
Fighting for a future without fear? Yeah, Chris Redfield believes it is worth it. See them in Resident Evil Series.
Driven by guilt and rage, Kratos is less a man and more an unstoppable avatar of anger and hate. See them in God of War.
The only thing Albert Wesker cares about is turning himself into a God. See them in Resident Evil Series.
A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.
A reformed former outlaw, John Marston doesn't want any trouble, yet somehow trouble always seems to find him. See them in Red Dead Redemption.