Since when was he a very good poster?
This
He's good enough for you to, presumably, dislike him/his posts (unless you're just questioning my statement for the sake of it) without being banned - so he contributes to debate/conflict on the forum in a non-twattish way. That makes him a good poster for the forum, IMO.
Hopping off the fence for a second, I think a lot of what he says makes sense too.