Well, since you asked for criticism, straight on lighting rarely works out well for knife pictures. If you have a couple of lamps you can light from two sides and turn off the flash, it will help keep the reflections down.
If you really want to go super high-tech studio lighting, you can make a light tent out of an old white T-shirt and some kind of frame out of cardboard or small PVC pipe. Lots of tutorials online about making DIY light tents.
Really like the knives though, very nice work!