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.
Absolutely, it's a very intuitive and straightforward program! I don't know how many sketches I've made in this (that sadly will probably never see the light of day )
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.