I am not sure how much was done by iD and how much by Raven. The Hell level was the best of them all.I though Quake 4 made up for anything Doom 3 did wrong, but I believe it was actually created by a different company. I enjoyed the listening to the PDA stories and solving a few puzzles here and there.
There were some great parts, but a little too much of the tiny dock corridors. I enjoyed Doom 3, but it didn't age very well and going through it again was a little tedious.