Very light... and whiteby
MonimixComment: *Greetings from the Critique Club*
First let me say that I think this shot met the Light on White II Challenge very well (as evidenced from its 48th place finish and 5.6+ score). As your first challenge entry, I think it's outstanding (you shoulda seen mine - lol!).
Composition
I think this is probably where your score suffered the most. I notice that several commenters mentioned the "centered" composition and the lack of "rule of thirds". I think if you had cropped this differently, so as to use more negative space (along the rule of thirds), this probably would have scored much higher still.
Lighting
Very good. Light/White on white is NOT an easy thing to do and you managed to maintain nice soft tones without blowing any highlights. Good job. A few people mentioned the shadow and their personal preferences - as for me, I like it because I think it adds depth.
Focus/DOF
Very good also. You managed to achieve strong focus and a pleasant DOF without going overboard. Very appealing to the eye and really brings out the textures in the shot.
Overall
Great job. I think this was a very strong entry in the challenge and certainly one I'd be proud to have in my portfolio. And without any additional shots in your profile/portfolio for me to base your experience on, it's difficult for me to determine whether you're already familiar with the rule of thirds or not (the level of expertise on this site as you know is quite varied). It's a fantastic start for you here on DPC and I look forward to seeing more of your work!
Just my 2 cents...
Jimmy