I use like 15 cus it is way easier to aim. Higher sensitivity=fail aim.
I use 38,i'm a sniper guy so i need quick aim.
13~~~~~~~~~~~~~(when i did play)
I use 7 because I have a 2500 DPI (dots per inch) laser gaming mouse.
That means I get 2500 dots across my screen for every inch I physically move my mouse.
wholy hell some of you use it crazy high!! i only go up to 9 at the most XD
I use 20 when I play with my laptop. I use a 13-15 when using my other computer.