Vibration

If you're like the vast majority of Halo 3 players, you probably play with vibration enabled. It is a default setting and in my opinion, a general annoyance.

Pros:

• It can help you quickly react to an attack from an opponent
  

Cons:

• It interferes with keeping a steady hand - in BR battles every second counts and you will lose every time if you miss a shot because of vibration
• I find it causes you to screw up a lot. You will experience boosts of adrenaline when your controller is vibrating in fast - paced combat scenarios when in fact you can play a lot better with a cool and steady hand.

Although it will take you some time to get used to playing without vibration, I STRONGLY suggest that you turn it off.

How to disable vibration:

START
Preferences
Vibration
Press Enabled to Disable.

When you learn to play without vibration you will notice your skill with precise aiming weapons (Sniper rifle, Battle rifle, Spartan laser, ect.) to increase.