OH man I get such a nostalgia kick from the original Doom 3. There's just something utterly terrifying about having to swap away from your flashlight any time you wanted to shoot anything.
It was a bit like closing your eyes any time you ran out into combat, not at all something instinctual or comfortable. Love Doom 3, one of the scariest games I've ever played.
I agree, the fear is real in that game, i used to scare my younger sister by screaming "Pinkies are in the basement" then running away lol