I got the game, too, and I love it! I really am not in awe when it comes to graphics (I wasn't all jumpy about FF8 or FFX when they came out in terms of graphics), but with DOOM 3, I was in awe, even on the lowest settings! John Carmack is a true genius!
But, sadly, because of the low settings, which goes to show how well it runs on my computer, it kept crashing more and more and I had to stop playing. :( I made it to Level 4.
I like the addition of the flashlight, and I do find the game to be really creepy and suspenseful. But also predictable at times, so I wasn't too scared, since I basically expected a couple monsters per room.
But it sure got creepy when there were no monsters in a room! O_o