Hardest part about the first-person camera scenes is that it breaks the immersion for me when the screen doesn't have the 'player' move the way I would move them. Like going up the stairs, I'd be back against the far left wall and strafe left to view what's up the stairs, not running along the inside to give myself the least situational awareness. That said, it works better for the movie for the viewer to not be able to see what's ahead if you hope to scare them, but being an FPS player it's a break with immersion.