Wow, JoJo, you have a great range of products. The Portal stuff is my favorite, but I'm particularly bowled over by the silk paintings.
My critique is the one most often given: photos, photos, photos. It's what really sells your product. Rather than laying them flat, try to make stuff look more dynamic; hanging on something, or being worn. If that is difficult to do, I'd recommend fotofuze.com. I use it for my origami listings. No matter how white you think your backgrounds seem, it makes them whiter and gives your item more "pop."