Revenge

According to Tim Shaw, revenge was what every living creature wished for. (TV: The Battle of Ranskoor Av Kolos)

Korst Gogg Thek Lutiven-Day Slitheen sought revenge against Luke Smith for the death of his father. (TV: The Lost Boy)

Before Clara Oswald had been killed by a Quantum Shade, she begged the Twelfth Doctor not to take revenge. He bitterly noted to Ashildr that this had been Clara's way of saving the immortal. (TV: Face the Raven) After spending billions of years trapped in a temporal loop with his grief however, he abandoned this promise, (TV: Heaven Sent, Hell Bent) a Time Lord author speculating that the Doctor's claim of knowing the truth about the Hybrid was an elaborate form of revenge to scare his people in retaliation for their killing Clara. (PROSE: A Brief History of Time Lords)