Wet earth and decaying leaves. They are scents I like for some reason and ones my mind can summon up easily. Even if you are outside taking pictures, there shouldn't be any reason you couldn't help the arrangement along. Maybe adding a red or yellow leaf might have given this one some punch?
A good choice, and a smell I love. But these leaves lack the colour of autumn leaves - I think that it would work a lot better as a picture if you'd found some colourful leaves. (5)
Nice color and detail, and there is kind of a "graininess" to the image that I really like. Composition is such that you have enough of a tonal range to make it interesting.