In "The Most Dangerous Game" by Richard Connell, what gives General Zaroff the most pleasure is hunting men. Long ago he tired of hunting non-human animals because none of them could outsmart him. Because a man can think and strategize more than any other animal ever could, he is a worthy opponent for General Zaroff. When Rainsford shows how appalled he is about hunting men, Zaroff answers,
"Precisely," said the general. "That is why I use them. It gives me pleasure. They can reason, after a fashion. So they are dangerous."
Zaroff is especially happy that he will get to hunt Rainsford because he is beginning to feel bored with the sailors he has been hunting. They are not as smart as he would like, and he is sure Rainsford will be a much tougher opponent.