My illustrations fall into three categories. The first is vector based works. These pieces are created using Illustrator or Inscape. The second group are image manipulated illustrations. I usually use Photoshop or Gimp to construct these. And, finally the 3d modeling illustrations, which can combine all three forms in some instances. I use Blender for these creations. Many of the pieces are symbol or graphic elements. I also like to do conceptual pieces.
Illustrations work better in many circumstances where a photo just is to personal or can not express the idea as well. I have a very clean style and although I have tried to change it I seem to just fell uncomfortable with anything else.