In typical fashion, I was "captured" by the sight of this hanger-on as soon as I spotted it, but had to explore positions and angles to try to find the effect I was imagining.
I knew right away that I wanted to feature the contrasting blues and yellows in the background.
Generally, when photographing a relatively flat subject (though this leaf was actually quite curled in its dry afterlife) and wishing to separate it from its background, a good strategy is to align the plane of the subject with the camera sensor and open the lens wide for a shallow depth of field. This can render the subject sharp and the rest of the scene blurred. However...
...after working the scene for a while, I decided that potentially the most powerful aspect of the subject was the kind of dancing character that appeared when the leaf was viewed from a bit of an angle. The gradual softening of focus from the nearest part of the leaf to the furthest also adds a sense of motion that I like. So, my final take: Last Dancing Leaf.
[all photos, Canon EF 100 mm f/2.8 L IS macro]