Sky Render on 24 July 2008
A common reason: because nothing (and I do mean nothing) on the system interests me, presently available or in the near future. What few titles sound remotely interesting to me either have a bad reputation with me (FF13 has FF12 going against it on my personal record, and Level-5 botched Rogue Galaxy badly enough to make me wary of White Night Story), or would be more interesting on PC or Wii (LittleBigPlanet begs for mouse or Wii Remote controls).
Sky Render - Sanity is for the weak.
