Auto brightness may not be the optimal thing to do when you are switching your areas or when you need to switch to photo, video modes. What comes handy is an app called Brightness Motion that lets you adjust your phone’s brightness with a tilt no matter where you are, without having to touch anything.
Normally, users tend to keep brightness quiet low but when its time to show off, you pump up the brightness to showcase the power of the phone. With Brightness motion, you can turn your phone to increase or reduce the brightness.
See Motion brightness in action:
The app is free on the android market, however there is a pro version available as well that costs $1 and comes with several additional tweaks like auto start at boot.