One word: arghh!!!
I just spent about 3 hours playing Doom III and it's everything I expected and more.
The graphics are generally excellent, lots of dark corners you just have to check with your torch and awesome pixelshader effects all over the place, although the low res textures on the people's clothes really annoyed me.

Being used to Far Cry, I've also seen a lot of this before which is a shame.
It really is as if they opened a gateway to hell, it's complete chaos in the research facility, some of the visuals are pretty gruesome and it can get quite violent so it's not a game for kids.
The area I think it really excels is the sound though, I highly recommend a minimum of a 5.1 system playing it - the voice acting is also superb.
The gameplay rocks, it feels bit repetitive sometimes but it's not too bad, you're usually on the edge of your seat the whole time you play it and a few times I yelled out "oh <expletive>" when something came around the corner and lunged at me.

I also like the scout-bots, they were very cool.
My system played it extremely smoothly on max details and the high quality setting at 1024x768, in fact it plays so well I'm putting off the purchase of a new graphics card for a while I think.
I'll see what it plays like at 1280x1024 tomorrow but I'm not really that bothered, you don't notice the jaggies when playing.
Anyway, I've got some screenshots up - a couple attached and some more here:
http://www.richardm.co.uk/images/for...m%203%20Grabs/
PS. Try not to play it in the dark.