First off, I don't get scared. Derelict ships floating in the recesses of space would be nice. I would like to see the enemy attack us right after they somehow force a power-outage onto us. Going into a cave or the bowels of the Traveler and being shut in a deep dark with nothing but a torch/flashlight would be fun. Crashing in a jungle as the sun is setting and finding out you are in the heart of a Cabal/Fallen/Glimmer/etc. infested area and you are far from help or the Last City. You are alone, with no ammo or weapons. Just the darkness and the swiftness of your movement making whispers in the dark. I would like to see those kinds of things.