One of features I love on my new G-Shock is automatic backlight option.
It is really cool, and it doesn't bother me if it sometimes accidentaly turns on since the watch is tough solar, so no battery worries there.
Even when driving it is not a problem for me.
Good thing with solar panel is that it also serves as ambient light level detector.
But as far as I could discern from reading the forums, some people love this feature and some never use it.
So here is one poll for you about the usage of backlight.