Maybe a little too subtle, focusing on the bud, but it is a good shallow DOF. Might be crisper at a lower ISO, though I don't know how much control you have with your camera. (BTW, I think your lower scores are way out of line considering that so many high scoring entries showed limited DOF, but not narrow DOF).
The composition here is quite nice although I'd like to see more depth in the forget-me-nots as the focus seems to have fallen on the purple flower instead. It also looks a little oversaturated.
Great use of a shallow DOF on this. The unopened buds seem to the focal point, but personally I would find the photo more interesting if one of the flowers was the focal point.
I love this kind of flower. Just my opinion, but the border (esp. color) really detracts from this for me. It's also a bit grainy for my taste. Nice isolation of the upper flowers and I like the overall composition very much.
The focal point seems off to me. It feels as if the front flower should be the primary subject for this composition. Also the border fights with the image for attention (distracting rather than complementary).