I ride with a Lumina 650 on my bars and a Dinotte XML-3 on my helmet. On the unlit MUP they're both on low, but when I get off the MUP and have to contend with the cars and traffic lights, parking lot lights, and street lights, the Lumina goes into high/strobe and the XML-3 goes into High (at least until I turn off into the residential areas). I used to try running the lights on low on the street, but about a couple of months ago when I was making a U-turn (with the green left turn arrow), a car to my left decided it just couldn't be bothered to stop for the red light and almost took me out. And last night as I was approaching the entrance to the MUP a car started pulling out of the driveway of a nearby apartment complex without looking; it almost took out a pickup truck ahead of me. You better believe I lit up the interior of that car to make sure the driver was looking my way. Of course running my lights on high is no guarantee that won't happen again, but at least I feel a little more visible and the helmet light can be used to "light up" the approaching car.

That being said, I do have my bar light pointed down a bit. I also agree there always will be some people who don't like the lighting you have - either too much or not enough.