> interminably long suspense sequences that are literally just someone walking through a dark environment while spooky music plays.

The few film studies classes I took in high school and college taught me so much about the hows and whys of film, that I can't possibly now watch a sequence like that and think "just someone walking through a dark environment". So much going on in those scenes that you'll miss if you're not interested in looking. That's not to say that everyone will be interested in, say, how the scene is framed, choice of camera focus and depth of field, where the lighting is coming from, or where the characters placed in relation to each other, but it's all there to observe and enjoy if you like it.