Hi Peguy!
I like to read a lot of non-fiction, too. It really depends on what I am interested in at the time. Right now, I am reading a history of Hollywood. I live about 40 minutes from there and I decided it might be interesting. I wanted to see how it became a place for movies, stars, etc. I've read a lot about different things... anything from WWII and chemistry/biology to many biographies of Marilyn Monroe and geisha. I'm eclectic, I guess! I can get interested in almost anything, unless it is really abstract and theoretical. I have a hard time understanding big picture concepts, but I get better with age.
BTW, my boyfriend is an INFJ, and I know you all are rare. Very cool.