I’m different that way. i mean, my second-oldest brother, soda, who is sixteen-going-on-seventeen, never cracks a book at all, and my oldest brother, darrel, who we call darry, works too long and hard to be interested in a story or drawing a picture, so i’m not like them. and nobody in our gang digs movies and books the way i do. for a while there, i thought i was the only person in the world that did.

what is the theme of this excerpt?