I like the little drop of water a lot. Because the background is brighter than the subject, the sunflower itself gets a little lost, however. Fill flash would be an interesting option on a reshoot, or a tighter crop that emphasizes the drop.
I like the drop that hangs off the petal. The bright background on the top is a bit distracting. My eye keeps wondering around in the frame, I wish I could just focus on that drop. Maybe try a different crop, as routerguy666 suggested?
Nice tones, and good exposure. Might consider playing around with different crops to see how it would look /o being more or less dead center in the frame.