For me, in CV games, I'm always stoked and revved up to kill monsters. Kill monsters, kill monsters, zombies, vampires, frankensteins and mummies! But if something suddenly stops you dead in place and you can't move forward until you solve a puzzle and open this gated door...yadda yadda yadda, it puts a cramp in the plan, IMO. If the puzzle's simple, or ever FUN, that's fine. If it's one of those types where, you have to find pieces of a keystone, or some moronic shit, and one of them can ONLY be seen if you stand under a specific archway and rotate the camera upward and right, that's not my idea of fun. When it comes to stuff like that, I'm jumping around, screaming, "Where the FUCK are this little things?! Why is this keeping me from having fun?!".