Because you like Peter Venkman in Ghostbusters
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.
Maurice Moss is a dedicated IT guy who even talks like a computer. See them in The IT Crowd.
Jenny Flint is a devoted wife and daring crime fighter, which is pretty unconventional for a Victorian maid. See them in Doctor Who.
This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.
David Rose likes his rose chilled, his linens pressed, and his family quiet. See them in Schitt's Creek.
A devoted butler, Alfred Pennyworth is both a fiercely protective guardian and a lethal gunman. See them in Gotham.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
Amy Farrah Fowler deserves sainthood for putting up with Sheldon Cooper. See them in The Big Bang Theory.
Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.
D.J. Tanner is a rebellious teen who wishes her lame dad would butt out of her personal life. See them in Full House.