I think people who can't use a PS3 pad must be wrapping their hands around it. The sides/bottom of the 'handles' should come no further than the base of your fingers, not in your palms, which coincidentally puts the sticks in a great natural place for your thumbs.
I get on fine with both PS3 and 360 pads, but it always intrigues me when people say the 360 is more natural when one thumb must go higher than the other.![]()
Both are better than the N64 pad lol, but the 360 pad just feels weird to me