A friend asked if I enjoyed hard games like Demon Soul and for my surprise I found the answer was... yes.
In the past, I played games to finish it or, like I said "to see the end of it". There was no way to change the challenge level so If the game was too hard, tough luck.
Some games were harder, some were easier but you adapted to the game, not the opposite.
Today most games have different challenge setting but even the hard setting doesn't put too much of a challenge unless you are going for the achievements and even these sometimes demand more time than skill.
So when I find a game who people claim it's hard like Ninja Gaiden or Demon Soul I got excited because they may pose some kind of challenge.