As an aside, I wonder whether your instructor has or would give you, an operational definition of EXACTLY what is being evaluated for your grade. Images are subjective....as evidenced by the varying opinions given here. I find each of your images pleasing....but for different reasons. If there is no "metric" being applied to evaluate your work....I would suggest this is simply malpractice....as is quite typical amongst University professors. As a professor, I would be much more interested in hosting a round-table open discussion of each image (by each student)....and I would listen more to the quality of critical thinking (articulation, communication, depth/breadth) going on between each participant, than to the quality of the images themselves.

A better learning tool might be to have been given a well-developed rubric....showing the different levels of "goodness" and WHY (clearly defined and with measurable criteria). IMHO, too often an instructor says, "go off and do good things" without ever CLEARLY defining what a good thing looks (acts, smells, tastes, or feels) like. This happens in schools, at all levels, across the country....every single day. That's no way to teach and it certainly is no way to learn!

Only a well-defined standard can be measured. PS: Don't tell your instructor any of this or you will reap the wrath of the "full professor" with tenure.