I use whatever you start out with I got used to it and like it. I dont feel like checking so if anyone knows what it is I'd love to know
I use seven, and i tear the **** up. Every now and then i'll panic and end up swipe-shooting someone and feel like a boss for swinging my reticule back and forth.
i move mine around a lot, i dont know why. If i get ****ed over by low sensitivity in close quarters, i move it up, if i get ****ed over by getting twitchy and missing, i move it down. depends on my mood really, if im super awake i hang out on like 7, but right now i'm on 3. In snipers i like playing on 1.