Red Alert 3 killed it for me. I absolutely hated the allies on the single player mode. I like to build up a massive force and then storm the enemies base, but what I found is that the AI allies would attack right away, so by the time I had built up my forces, they had pretty much destroyed the enemy, so all that was left to do was ride through taking out a barracks, perhaps three troops and whatever else was left. I think they wanted you to attack constantly, but I don't enjoy playing like that.
