I stop dead center behind the stop line as far forward as possible to allow the most cars to sit over the sensor as possible, sitting right over the center sensor line. Then when the light changes, I pull out so at least 2 cars who also want to turn left have room to pull out over the stop line. Then at least 3 of us can go once there's a break in traffic. I don't give a rip about anybody who wants to turn right or go straight. As far as I'm concerned, the center sensor line is my turf.