I really like having my game flow interrupted when I pick up or change weapons.
Same goes for using chainsaws on things, it's great to have an entire cutscene happen!
I also really like nauseatingly low FOVs that make me unable to loving see anything.
Slow movement speed is awesome, I've always wanted to be on-par with Master Chief in a footrace.
I love the bass farting noises genre and vastly prefer it over heavy metal.
Doom 3 had such great monster design, I'm so glad they're recycling the Hell Knight and Duke-Octobrain's-handicapped-Cousin Cacodemon! Minotaurs aren't cool anyway and spherical red cyclopses are so 1993.