I used to be decent at FPS till I played LA Noire. There was a mission that you had to keep the crosshairs on your target to initiate a warning shot. After that, I do good to break even on my K/D ratio. So now I'm a try-really-hard-to-break-even.
If there are two evils, I'll try the one I haven't done yet. Gamer tag: Spinal101