I've now watched Totoro 8-10 times. We read the book at night. I make ocarina sounds as I get him ready for bed. There is something really beautiful about the story – it feels magical. The illustration style, music, and pacing are perfect. Unlike a lot of children's movies today, it has a sort of calming effect on Sonny. I have to credit my sister and brother-in-law for turning us on to it.
I've included some of my favorite stills from the movie below: