I might be looking too hard, but that's probably because I've eaten 4 bananas today. I think that if you put tiny indentations on the sides of the banana slices, they would look even more awesome. Also, have you tried rolling the citrus rinds on a brush for texture? If your average nail brush bristles are too big, you could try a brass-bristle suede brush. The bristles on mine are tiny and very close together.
Your creations are amazing! So fresh, appetizing, and beautifully executed.