Hiya Andy,
Well done, these are lovely photos, the colours vibrant and nice DOF too.
I agree with what Neil (aka Mentalblock) posted and for me some minor niggles are also due to OCD .... as follows:
#1: I like the dof and colours, could perhaps do with a slight sharpen to the image, some do appear slightly over exposed (perhaps applying a gradient filter may improve this).
#2: Another great shot, however I would have placed or omitted 4th from the left as it is not uniform to the other pencils due to the mark on the base.
#3: I really like this one, makes a fantastic abstract.
#4: I like this one too, however all the pencils need to be at the same level and perhaps clone out some of the artefacts,
#5: Another good pict, but again ... attention to detail, i.e., the split in wood of the pink and lilac pencils, the few spots here and there and also light reflection.
I really like this idea and may try something similar at some point.
Well done
Cheers
Dawn