Bike Lights: Helmet Mounted or Handlebar Mounted I am just curious, I use handlebar mounted lights, and since I have multiple bikes to switch, it's a lot of trouble changing the light from one to another. So, I am thinking of switching to helmet mounted lights.

Give me your point of view. Why or why not? Which is better suitable for which riding type?
The answer, as others have said, is "both." However, if you are only going to use one light, there is a disadvantage to that one light being helmet-mounted. When the light is mounted close to the eye, everything that is illuminated is "flattened" since, from the eye's perspective, there are no shadows to provide information about depth. In particular, it's harder to see potholes or other road imperfections. That's why randonneurs often mount a light on the front fork near the hub -- the distance between the light source and the eye helps highlight the road surface. A second issue arises in fog or rain: in that case, with a helmet light you'll get reflections directly back into your eye. That's why you don't use "high" beams when driving your car in foggy conditions, and why fog lights are mounted low. 

Given these reasons, a helmet-mounted light can be an excellent supplement but shouldn't be used as one's only light unless you are riding only in urban areas where you can rely on additional street lights to keep the road surface well-illuminated.