I don't think the subject matter is of any interest. Its pretty basic. These shots work well with Cityscapes because city skylines tend to be very dynamic and often times have identifiable elements. With this shot, the buildings all sort of run into each other at a flat level and the lights tend to become a big glob of light. Its a nice practice shot for this style of shooting and you had the right idea in mind with framing the trees around the shot, but you just need a better subject. You could have possibly zoomed in with a long tele, getting some of the water and reflections in, but being tighter on the building in the center( the larger one ) to accentuate the shape more and isolate some of the lights. Thats just one opinion though.