Citing a waning ability to have fun with the game, item statistics that really don't help with anything, and a lack of variance in armor and items, Smith is calling it quits with Age of Conan. His comments seem to mirror the comments of many others, but one particular subject stands out in his blog from the others: the much touted and praised player vs. player endgame.
Smith brings up the point that he feels like "another cog in the wheel" of his large guild. In order to see the content of the endgame cities and city sieges, he joined a very large guild and is expected to provide materials to help with the construction of the guild city. But, without player housing, any type of city mini-games, and lack of bonuses offered by the city itself, he just feels like another faceless voice instead of a heroic city builder.
His article touches on the ability to stand out inside of a game where a person may not be able to stand out in the world itself and how it links back to his decision to cancel the game. If you're interested, be sure to drop over by to the Dragonchasers blog and check it out for yourself.