Hoping for some criticism on this photo. All opinions welcome.
I like it. However, if you want feedback then it would look better if the subject was brighter than the background. This thread is not the right place for evaluation of images, except in relation to the lens. So to stay on topic, one of the best accessories that you can have for this lens is a better beamer flash extender. It throws a decent flash as lot further and makes a great fill flash on images like these.
I have found that with the flash on high speed sync you can leave it on, and if you are close enough, it helps, and if not, no harm done.