You do have an eye. I'd lose the watermark - at least until you have images that others may want to copy. Also, be aware of the foreground/background of your subjects - in the first image the pattern of fountains is interesting, but the backround is too clear and sharp and distracts from the main subject. In the second, fourth and fifth images there is background stuff that does not contributed to the main image. In general, include the background when it provides an appropriate context for the main subject, and eliminate or minimize it if it distracts or competes.