How would you ask someone about their favorite holiday destination?

"Where is your favorite place to go on vacation?"

"Which destination do you enjoy visiting the most?"

How would you respond if someone asks you about your favorite book?

How would you ask someone about their favorite type of cuisine?

 "Do you enjoy trying different types of food?"

How would you respond if someone asks you about your preferred leisure activity?

"I don't really have any specific hobbies."

"I really enjoy [leisure activity], it helps me relax."

How would you ask someone about their preferred form of exercise?

"What is your favorite way to stay active?"