Can't see why anyone would be excited about Quake 4 after Doom 3 was so bitterly dissappointing. I'm not at all interested in fighting another demon with a chaingun mounted on his sternum or something similarly stupid. I bought AoE III after being impressed by the demo, but there's really very little to the game, the demo skirmish mode lets you build basically every unit building and upgrade that exists in the game, the campaign is so bad it's a joke... Call of Duty II is wait and see could be good but nothing amazing.
FEAR on the other hand is the best thing I've played at least since Half Life 2. In the dark with headphones - you will jump at least a few times. Not obnoxious stuff like a monster popping out behind you in doom3, I'm talking about simply knocking an object off a desk as you pass by in a tense part of the game can be enough because of the atmosphere. The AI is simply unmatched by any game ever released, even on normal they are the smartest bad guys ever put in a game. My major knock against the game would have been only two kinds of bad guys, until I fought my first ninja... Play it for yourself.
Civ4 will make me unproductive for months...