I thought the game sucked and was boring...Couldn't play it for more than 5 minutes without yawning, quickly got rid of and went back for more DooM 3!!
For example I'm about to say :
IMO, Doom 3 was boring because it had the cheapest method to scare you (Open door, OMG monster - it got boring after the 500th time).
Far Cry was fun, loved the AI and atmosphere, but the indoor levels were just incredibly boring and rather linear.
And to finish with the big 3 FPS' of that year - HL 2 - Linear. Just too linear.