Because you like M. Bison in Street Fighter
Just call Jeff Lebowski The Dude. Or His Dudeness, Duder, or El Duderino if you're not into that whole brevity thing. See them in The Big Lebowski.
When it comes to Haruko Haruhara, there's more to the pink-haired biker than meets the eye. See them in FLCL.
Not only could Hellboy avenge your death, he'd also have a sense of humor about it and not let it ruin the rest of his night. See them in Hellboy.
Ezio Auditore Da Firenze is a little short-tempered, a lot fun-loving. See them in Assassin's Creed Series.
Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.
N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.
Yugi Moto is a gentle soul whose determination and talent make him a formidable opponent. See them in Yu-Gi-Oh! .
Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.
Tony Montana makes up for his language barrier with his immense skill at cursing as loud and effectively as humanly possible. See them in Scarface.