@Lark: Feeler may be more common for poets, but by no means do they have a monopoly. Just as Intuitives are probably more common for poets but they can certainly be Sensors too. One of my fav poets, Louis Macneice - I'm pretty sure he was some kind of TJ and I think either ISTJ or ESTJ are very probable for him. He was very insightful but very sensory-based at the same time - and he viewed himself as someone who sort of was like a "journalist" for poetry.
@Il Morto Che Parla: I must say INTJ didn't occur to me. So it's more a case of you or someone convincing me he's INTJ, rather than me convincing you he's not. If I were to subscribe to stereotypes, I'd say he doesn't seem socially awkward enough or argumentative enough to be INTJ. But yes, those may be stereotypes.
My mom and my brother are both IxTJ, I'm pretty convinced. I think they are either ISTJs with strong Ni or INTJs with strong Si (my brother especially seems more ISTJ to me but I'm not sure.) I don't get a similar vibe from them and from this guy. They're less social/less interested in people (my brother seems quite outgoing, but that's almost exclusively in the professional sphere as he has a lot of business contacts and does a lot of networking). They also don't give off anything resembling "flirtatious vibes" either in written form (though they are both writers) or in person. (Although maybe I just don't know about it because they're my mom and brother. )
But I'd be open to a good case for INTJ. He just seems more xxTP to me. More flexy, maybe? He'll go off on a rant about something he feels strongly about, but then he'll kind of laugh at himself or say "oh I'd better stop before I sound too reactionary." Seems more TP than TJ to me.