Because you like Vincent Vega in Pulp Fiction
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.
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
Derek Morgan is thoughtful and kind, but he won't say no to knocking the occasional door down when he gets the chance. See them in Criminal Minds.
Morticia Addams hates anything bright and cheery and loves all things ghoulish, ghastly, and violent. See them in The Addams Family.
While his twin tries to save lives, Millions Knives does the best to end them. See them in Trigun.
The party never really ends with Penny Lane, a rock-worshipping groupie who is refreshingly self-aware and free-spirited. See them in Almost Famous.
Lily Aldrin is a flaky but supportive kindergarten teacher and painter. See them in How I Met Your Mother.
A smart, spunky, and incredibly skilled gamer, Art3mis has a revolutionary spirit. See them in Ready Player One.
Ted Mosby is a hopelessly romantic architect in search of someone to be the mother of his children. See them in How I Met Your Mother.
Howard Wolowitz is an engineer whose serious mommy issues somehow haven't dimmed his confidence. See them in The Big Bang Theory.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.