I was messing around with sketchbook pro and got this. Sketch book pro is a great alternative and sometimes easier than photoshop. Anybody with a budget should really look into Autodesk's Sketchbook pro.
just post it, mileage is what matters more than working on one piece for several months. The loose sketches matter as much as the 1 artwork that looks fantastic. Overall the looseness captures more of your raw talent, post it.