Because you like Conan in Conan the Barbarian
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
Aldo Raine is in the killing Nazi business. And as he says, business is a-boomin'. See them in Inglourious Basterds.
Ted Logan wants to party on, but if doesn't get an A+ on his history presentation, he'll flunk out and be sent to a military school in Alaska. See them in Bill & Ted's Excellent Adventure.
Leone Montana is a fearless hitman with a surprisingly sensitive side. See them in Leon: The Professional.
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.
Bob Parr is an ex-superhero now focused on being a dad, but he misses the action. See them in The Incredibles.
John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.
Green skin, pointy hat, evil cackle—this villain has it all! See them in The Wizard of Oz.
Benoit Blanc is Sherlock with Southern charm, and a mysterious benefactor. See them in Knives Out.