This was brought to my attention after reading Kotaku's article about how the Dualshock 3 controller sucked. Apparently there are people who hold the controller with their middle fingers resting on the back triggers in some kind of "claw" formation, instead of using your middle finger to prop up the back of the controller, which prompted me to test it out. Not only did I quickly realize how utterly uncomfortable it is, but also brought to light how some complaints I thought ridiculous, like thumbs bumping into eachother when using the analog sticks, could actually be possible.
So I have to wonder, do people actually hold it like that? And if so, why are you doing that to yourself?
Protip: This is not how you should hold the controller.