I've never really thought of Photoshop as being good for output. Always Illy for that.
I am really baffled as to how photoshop has become an illustration and design program for some people. Ok, I can see its use for illustration, but I still think that illustrator is a better tool for that.
Photoshop has an airbrush tool.... It was a natural progression for me from traditional airbrushing. With PS and a stylus, I can paint with airbrush or paintbrush like I would in the real world.
Illy's good for drafting... making precise curves and complex shapes, but for shading it's not as natural or controlled as PS... you can get the same results with blends and meshes, but you get there by clicking and bending lines, not actual brush strokes.
