Being Forced to Backtrack Through Areas
Again, some games can pull this off and get away with it, some games, hell, entire genres are based on this idea. But in most cases, backtracking just plain sucks. Bonus anger points on the hatescale if the enemies respawn. Yes, thank you, I would have been bored otherwise. Metroid does that, and that works most of the time.
But other games that are not Metroid (or Castlevania), don’t even try. Chances are, your bluff will be called. You liked those levels so much, you just had to show them to us twice. Or more than that. But we don’t care, we want to move on. Unless of course, you are Metroid and there might be a health tank hidden somewhere here.