MAX mostly because of higher-and-alot-better response on the camera stick, the motion controls change is not that big, you can quicklly adapt to it, but the change in response for the camera stick is tremendous! Very useful for quick long turns and, since the motion controls are maxed too, the mid long turns are faster.
Though, I think I should get used to Y positioning for an even better full turn option when looking for threats.
[offtopic]
I use -3 cause it feels easier to snap on to people.
You're my senpai, I subscribed to your youtube channel and followed you twitch so I could get better, I only use the splattershot pro in a hope to get the same results you do (I wish the L-3 Nozzlenose could be a little more relyable, I fell in love with it from the moment I used it, even thought it was very overpowered...) because I think the pro sucks at close quarters, wich has been the majority of fights.-. but I don't know if I should lower my sensitivity to be able to aim as precisely as you do.