Whenever a fast paced action game like Devil May Cry, Prodeus, HiFi Rush or Doom have a grading system then I would feel like not continuing them as if some one is judging my performance, instead of a bar to get better.
It’s weird that this feeling never happens in a game like Hitman or Overcooked. I view them as challenges, but not grading like in DMC.
A grading system that does nothing doesn’t bother me. A grading system that unlocks highly desirable, but non-essential stuff will probably get me on my nerves, or get me to cheat. Tenchu on the PS1 had 1 unlockable item for each mission you got a GrandMaster rank