I'm not picking up the emotion in this shot. the model seems stiff and isn't making eye contact. perhaps a hair light and a bigger softbox would illuminate her personality a bit.
nice shallow DOF and clarity though - hallmarks of a good macro IMO. :)
6 - Nice straight on perspective. Looks like good potential. Just the darker areas on the 'longhorn's' right side (image left) resulting in lack of detail and grain, plus the right areas of surface it is on, whilst an interesting element/texture, competing for attention in my opinion. If the quality was there, even with a modified composition, wish this had been 720. Like the use of the shallow dof and the detail discernible is good. Colors are nice. Like the centered composition. Up to 6 from 5.
That's about as minimal on depth of field as it gets.
Kudos for getting the focus right on such an extreme close-up.
Focus rail? Tripod? Manual focus? I know it's hard at these levels.