The other one with the white wall in the background is nice too, but I prefer this one with the dark shadow. The eye only focus on the flower, there's nothing else to see than the light on the white petal. It really beautifies the jasmine flower. How lucky you are, the jasmine I used to have when I was living in Paris died because of the frost.
The 'white wall' shot was submitted for the sake of the single yellow flower in the middle; winter jasmine flowering at the same time as the summer variety which nornmally flowers between April and June but has now been flowering continuously (if slowly) since last December! I'm glad you liked the shade backgrounded one. I like chiaroscuro but it can be difficult to make an automatic exposure camera behave under such conditions.
That was it flowering in May 2006, taken with a dark shadow in the background. Here, taken with a white wall in the background, is the same plant, and a stem of its winter cousine, flowering simultaneously in December 2011 [link] ! In fact it's still trying to flower now, frost or no frost...