I cheat when I have the feeling that the level of difficulty prevents me from having fun. I want fun, not a challenge. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
I fear that often games are too hard, and even an editor at a german gaming mag said that devs should get down from their tower, into the lower regions of those who don't know every bit of their game.
I guess that's partly a reason why for example Z did not sell so well, and that has alrerady been admitted by the Bitmap Brothers in some sort of interview I remember.