In Hoot by Carl Hiaasen, why did Roy Eberhardt want to stay in Montana?

Because Roy's father worked for the government and was frequently transferred to new parts of the country, Roy had never lived in one place very long. He could remember living in ten different cities. Although he was born in Detroit, he didn't remember that city, so he didn't think of it as his hometown. Instead, he viewed Bozeman, Montana, as the closest thing to home that he'd known. He lived there for over two and a half years, so he had begun to feel comfortable there. Not only that, but he loved the scenery. He had never been anywhere else quite so beautiful. Its deep blue sky, craggy mountains, and winding rivers had settled in his heart.
When he heard that his dad was being transferred and they would have to move away, he was angry and rebellious. He even tried to run away from home so he wouldn't have to leave the state he had grown to love. But he ended up in Florida. All he could do was proudly declare that he was from Bozeman, Montana, which earned him the nickname "Tex" from Dana Matherson.