Marvin from the BBC TV adaptation of Hitchhiker’s Guide always amused me…although I am partial to my own take on Robot (and Turtle). K-2S0 from Rogue One was a stellar addition to a pantheon of never too cute, never too kindly ‘bots/droids.
My army of thermostats. They keep me in a comfortable environment at home and in my car. They help me cook thing in my ovens and keep my coffee hot. Sometimes, in public places, other people are in charge of the thermostats–this vexes me.