Do you use mouse acceleration?
The answer is simple... I don't
It spoils your aim and makes hand-eye coordination for precise aiming harder, not to mention, it makes those flick-shots almost impossible (they only look imposibble and they are quiet handy )
Maybe after a while I'd get used to it, but I isn't worth it. My current settings are perfect for me with 0 mouse acceleration and a sensitivity of 2 @ 1600dpi, and I get along with my aim pretty well at 1.30
Cy4 4ll L8tR