I'm 36 and have been purposely reading more nonfiction for the last year because I want to learn more stuff, but my inclination is still to read mostly fiction. About 12% of my 2022 reads have been nonfiction, in a wide variety of topics.

My only change in natural reading habits has been gradually branching out to a lot of different genres. Historically the vast majority of my reading has been fantasy, but over the last couple of years I've been reading a lot of other stuff as well - sci-fi, mysteries, historical fiction, horror, and even some contemporary here and there.