Battlefield: Bad Company 2. I know the game is good, I really do know it... but I don't have fun playing it. It takes ten minutes to run anywhere, when I get there I die instantly... for some reason, in that game, I just did horrible, so I ended up letting it go after a very short time. It's a shame because I watch other people play on Youtube and whatnot and it looks great, but... eh.
Call of Duty: Black Ops. I really liked Modern Warfare 1 and 2, didn't play World at War. Figured Treyarch wasn't bad, didn't deserve some of the flack it got. Played Black Ops. Loved the campaign mostly, although the continuing fixation with making everything so gritty and gray that you hate yourself is annoying. Yes, in Modern Warfare, the good guys did bad things.. hell, in the second one, it outright shows buildup to torturing a bad guy. But you still knew who was good and who was bad. I haven't finished the campaign, even now, but that's not really because I hated it.
The multiplayer makes me angry. I'm awful at it, and I'm not sure how much of that is my lack of skill and how much is game design or balance. It just seems like twitch-reflexes are the only thing that ever matter. Even when I know someone's coming, crouching, aiming down my sights, ready the instant he appears.... he always, one hundred times out of one hundred, casually rapes me and then moves on like it was nothing. He can be sprinting dead-out and kill me before I can even fire.
Eventually I just had to tell myself 'Enough. I'm done.' You can tell a whole lot of people made a similar choice, too; last I heard, 500-700,000 played online regularly compared with literally millions I saw on launch day. Now, that's still hellishly impressive, but Modern Warfare 2's still hanging on with an average of at least 50,000 playing still.
Armada 2526. Bought this game with the Impulse client and... it's like a markedly inferior version of other games I could be playing, such as Sword of the Stars, Sins of a Solar Empire, Galactic Civilizations 2.... It has the whiff of an indie title about it but that doesn't excuse it.