Maybe this information has slipped past me in this thread, but with all this discussion about the crew being focussed on the left hand engine, I ask myself - why should that be?
Apart from #1 engine being critical due to the propellers direction of rotation, is there any technical peculiarity to the ATR that makes the failure of #1 particularly undesirable? Possibly even to a point where actions in that case will be expressively briefed during the departure/emergency briefing?