The information available on DOOM3 so far makes it sound like another AvP-type experience, which is good.
The general look of the original Half-Life was so realistic that it was devoid of any emotion, and it was only the well-crafted scripting and the sheer scale of the events that imparted any sense of suspense on the player. HL2 so far appears to continue this let's-make-it-look-real-and-then-have-some-crazy-shit-happen approach to ambience. Irony is good, but you can only pull it off so many times before it turns into normality.
Yes, the graphics and physics technology of D3 won't be as functional as HL2's, gameplay is probably going to be quite linear, and naturally how can you get more unoriginal and blatantly derivative than by calling your game DOOM 3? But the AvP2 series and other moody shooters like SS2 or even VietCong showed us how ambience and pacing alone can create an immersive and visceral experience. While I detest the brute force approach of horror films, I like a good suspense/drama/thriller ride from time to time, something I hope DOOM 3 can deliver.
"Nothing livens up a robotic hymn of doom more than an amazing pair of jugs." - Brak