akr71
Hero
I agree that the Passive Perception autopass/autofail may tend toward monotonous or trivial when there are frequent secret doors. I would handle it by treating secret doors as puzzles. The party knows the door in there, but how does this one open? Now the players can roll (active) Perception and/or Investigation checks.
Think of the stereotypical secret door bookcase. Which book triggers the door to open? Have there been any clues that might lead one to the correct title? Maybe its not a book at all but pulling on the torch sconce this time. This will lead to a lot of work on the DM's part to make each door interesting and challenging and if the players don't like puzzles, they may get frustrated. I don't expect my players to necessarily solve the puzzle themselves - a decent Investigation will lead them toward the solution.
Think of the stereotypical secret door bookcase. Which book triggers the door to open? Have there been any clues that might lead one to the correct title? Maybe its not a book at all but pulling on the torch sconce this time. This will lead to a lot of work on the DM's part to make each door interesting and challenging and if the players don't like puzzles, they may get frustrated. I don't expect my players to necessarily solve the puzzle themselves - a decent Investigation will lead them toward the solution.