I recently bought a 360 & I can't get used to using RT as the primary "trigger" button. To me, RB would make more sense since it's where my index finger is instead of using my middle finger on RT. I like that Xbox gets DLC first, the Kinect & their exclusive games, but I can't get past this issue so I tend to buy most of the games for a different console. It seems like such an easy fix for devs to have more customizable controls for their games. I tweeted @xboxSupport & they said to post my suggestion here.