I really enjoy how honest he is. He says things bluntly, but clearly with a self-awareness. Especially the end, it's refreshingly melancholic.
I found it amazing, and very very interesting. It makes sense that, after such a long time in the woods, one would lose a lot of social/communication skills, but this case is even more interesting because he seems like an inteligent person and, while he didn't have any human contact, he read a lot of books. That's a really interesting combination, I think, because reading books is great exercise for the mind, and usually lead to some sort of self-analysis which I think made him very self aware. While I've never been more that a couple weeks out camping, I really like and somewhat relate to this line With no audience, no one to perform for, I was just there. There was no need to define myself; I became irrelevant. The moon was the minute hand, the seasons the hour hand. I didn’t even have a name. I never felt lonely. To put it romantically: I was completely free.
I found it particularly interesting that he is that honest; he doesn't care whether he is being rude or if he is offending the one he's talking to. Reading at the end, I partly found it sounding kinda egoistic and rude to the author that he told him that he didn't consider them friends nor would he miss him. On the other side of it, though, I found it very intriguing that he did reply like that as well, avoiding the lies and true meanings behind the curtains of nicer words.