I dont read that much these days and have never read any harry potter, but I listen to audio books as I drive a lot. Currently working through the Harry Potter books read by Stephen Fry, and im on Order of the Phoenix. teaching DADA was my thoughts on his career as well.
Yeah, but in that same book he says he wants to become an Auror, like Moody-- who at the time was actually a Death Eater in disguise. Harry goes through with it, too. He missed his calling as a Hogwarts teacher.