I'm a bit bummed that the scares are pretty cheap throughout the whole game, and there isn't really anything innovative about the game at all. The opportunities for great, inventive scares are definitely there but they didn't take advantage of it. I think it could have been a lot better.
Yeah, this game could've been way better if it tried for more psychological scares instead of "boo!" scares. More of those hallucination-y scenes and stuff like the disembodied voice whispering "follow me," and then leading you into an open elevator shaft so you fall to your death. Doom 3 should've taken a page from games like Eternal Darkness or (so I'm told) Silent Hill.
Yeah. Sort of depressing when you think about all the potential the game had.
I don't follow the "it's just Doom what do you expect?? it stays true to the originals" argument either, because Doom 3 couldn't be any more different from the originals. I'm starting to think that people who say that haven't played either game.