Maximum look sensitivity (10) is too slow. My argument for this is that, since there are enemies that can AND will one shot you the first shot they get, you'd want to be able to turn around, right? It shouldn't take you a full second to do a 180 degree turn when you're standing absolutely still or walking. (The whole in ability to look around whilst sprinting, like restrictions on looking up and down and to your immediate sides [about 45 degrees] is ridiculous as well, but that's whatever, it's unique, anyway...) Let me say this again, there are enemies that can AND will instantly kill just about any character (not from completely personal experience, I've only played as a Warlock, but I've seen a hobgoblin one shot me, as a full agility spec'd Warlock, a Titan and a Hunter all in the same match) in one shot. From me, this was because I was focusing on a specific group of enemies and couldn't turn quickly enough to face the new enemies that just spawned. I did see the blip on the radar and I heard all their annoying ... screeches. I was turning and it felt like an eternity. By the time I was able to see them, a Hobgoblin already had his weapon charged and shot me before I could aim in.