I generally only turn my front light on when I need to see. I figure that if I can see the path ahead of me, other cyclists can see me. Since my HID front light makes me stick out on a dark path, even if you're approaching from the rear, I don't use the blinkie. But I've seen other people complaining inthese forums about cyclists not using lights often enough on MUP.
So, which best describes when you use your lights on an MUP? And why?