It's not strange for a television show to be based on a book. However, it may be strange for an author to enjoy the adaptation of their work, especially when they don't have anything to do with what makes it to the screen. Authors who loved TV adaptations of their work are few and far between, but the authors who liked the show based on their work love to talk about how much they love the show.
The following authors who are in awe of the onscreen adaptations of their work come from every section of the library: Mystery, romance, true crime, and even fantasy authors have come out of the woodwork to praise the shows that took their original stories and made something new.
You're not going to see Stephen King or George R.R. Martin on this list. They're far too involved with the adaptations of their works to give an honest answer. These authors are genuinely in love with the things that television has done with their stories.