I love light filtered through a tree canopy.  I love the way it dances on the ground, the way it glistens in flying particles and the way it filters through leaves and creates a green glow.  Everything is touched differently.  Everything changes shape, value, and hue as the leaves and branches sway with the breeze.  
I painted this watercolor today, it is a rendition of a photo I took near the pond at my 'happy place' in Kentucky.