Killzone 2 (Initially)
I had been really hyped to play this game. However, once I had it, I was extremely put-off by the control scheme. Specifically, the responsiveness of the analog sticks. Combining the huge analog stick dead-zone with the awkward turning acceleration rate, made for one of the worst first person shooter experiences I had ever had. For me, the game was almost impossible to play. (This, coming from someone who has been playing fps games since as far back as wolfenstein 3d/ultima underworld/catacomb 3-D ). I know these control implementations were intended as a way to simulate the difficulty in swinging a real weapon around (at least that's the developers take on it...), but it just did not feel right for a game.
Eventually a patch was released that completely fixed this issue. After that, I was able play right on through this great game.