What aspects of art could we use in giving feedback? In education teachers do use these words when assessing art work of students. Talita Groenendijk et all. did a study and collected these (and other) aspects.
Talking about Originality and creativity we could use some of these words:
Creativity; divergent thinking; flexible thinking; flexibility; identification of distant associations; to what extent are ideas original, inventive, ingenious, non-standard in concept and form; inventiveness; originality; taking risks; playfulness; implementation; fluency; fluency of ideas; preference for novelty.
We could write a comment like
In your photo I see the elements A, B and C. I see a playful and associative use of these elements in your photo.
Roy Williams postete vor kurzem auf Twitter, dass es für die erfolgreiche Etablierung einer Online-Gruppe “comfort, fun, trust, engagement” braucht. In online feedback comfort, fun, trust, engagement are very important for online learning. Make your comments fun and comfortable.
Talking about the Picture:
Composition; contour fusion; detail; aesthetic organization; use of composition; how effective is the use of distance, nearby shapes and overlap?; The unity of the composition, the manner in which the main part is placed ?; color, shape and composition; lines; use of space ; organization (overall composition); flat or spatial representation; realistic placement of elements; representation; atmosphere; use of details ; relations that correspond with reality; differentiation in shapes.
We could write: I see a composition of the elements X, Y, and B and C that has a unity in color and a variety in shapes.
Concept / idea
combining concepts and rearrange parts; complexity of visual or conceptual ideas; clear intention; How suitable are the elements for the expressed ideas? do the elements express the intended meaning?; communication of personal ideas, intentions, experiences, information and opinions in visual and other forms; application of abstract relationships to generate a new concept; imagination; vision; visibility of intent.
I see a rich variety of colors. But I did not link your title and the content of the photo.
awareness of missing parts; elegant solution; impact of the product; inspiration; knowledge and understanding; multiple intelligence skills; productivity; clean and tidy; sensitivity; strategies and skills; synthesis; ability to transform things; ability to abstract and to go to parts of the whole; preference for cognitive complexity
source: http://www.lkca.nl/kennisdossiers/beoordelen/reviewstudie-assessment-in-kunsteducatie (Talita Groenendijk & Folkert Haanstra) (my translation)