Creator Backlash: Čapek disliked R.U.R, going as far as saying that he should not have written it. Romain Rolland recalls that when he watched a performance with Čapek, Čapek was constantly complaining how bad the play was.
Magnum Opus Dissonance: The play is Čapek's best known work by far, mainly because it originated the word "robot". The word was not Čapek's idea, and as described above, he didn't care for the play.
Sincerest Form of Flattery: The fact that the word "robot" originated in this play shows up via references to Čapek's name and the play itself showing up as Homage in a lot of other works of fiction, including Star Trek: The Original Series (in the episode "Requiem for Methuselah," the android's name is Rayna Kapec, an anagram, though not a homophone, of Capek), The Outer Limits (in the remake of the "I, Robot" episode from the original 1964 series, the business where the robot Adam Link is built is named "Rossum Hall Robotics"), Batman: The Animated Series (the scientist that created the HARDAC machine is named Karl Rossum, and a robot is seen driving a card with a vanity license plate that reads RUR), and Futurama (in "Fear of a Bot Planet", the planet of robots is named "Chapek 9").