QUOTE(gempakstarz @ Jan 3 2014, 11:43 AM)
haha im not think about KD at all bro..just mention how suck I am

u use default sensitivity in bf4 setting?
NVM bro, I also suck..to the max. For now. HAHA
I'm playing COD Ghosts now, have yet to get BF4..so the dynamics a bit different. But i guess the same rule applies; the sensitivity depends on your preference.
What I do every different game is, I try default first, then I just fine tune. Like for COD, I start at 3, then ramp to 5, after that 4.
Don't take it from me though, better consult masters, or watch a lot of "top plays" videos on YouTube. That's what I do anyway, to improve.