Just Cause 2 on PC, terrible characters and cheesy writing, but most of all terribe controls, the mouse had unremoavable smoothing/acceleration, and when I plugged in my xbox 360 wireless controller to see if that would work any better, I noticed how hard it is to aim with an analog stick and decided, you know what, I'm not gonna sit through a game which makes me feel like a cripple.
Bioshock 1: I really wanted to like it, the beginning was atmospheric, original and immersive. I would have loved to play it, except for the worst mouse control I have ever seen in a video game. It's so completely botched it's unreal. In Bioshock 2 it's not linear either but at least it's tolerable.
I have come to accept that console ports will have less-than-perfect mouse control due to sloppy programming and PC gamers being treated as 2nd class citizens in general and I can tolerate it a little bit in really good singleplayer games, but in multiplayer where I'm competing against others, I will need to have precise and perfectly linear mouse control, so that's why Bad Company 2 is unfortunately another game I won't be able to enjoy.