I got to fly a lot and always looked forward to it as a situation where no one can get mad at me for spending the whole time watching movies, playing games or reading books. Some of that childhood joy stuck with me, and I still look forward to a chance to sit back and read or zone out to music without any nagging work obligations
Pretty much the same reasons I like traveling on trains. The reasons why I don’t like plane traveling nearly as much (kind of hate it TBH) is the whole airport bureaucracy and security theater you need to go through just to get on the plane. And the incredibly cramped seats (though maybe not a factor for you, if you were privileged enough not to fly Economy).