I’ve been sketching around with some of the brushes in Sketchbook Pro.  I gotta say I’ve tried a bunch of different drawing programs and Sketchbook is my favorite for the simple reason that everything can be controlled with the stylus.

My kids playing on a snow mound:

My daughter’s cat, Oreo:

My son playing video games:

Interested in Sketchbook Pro?  Check out this link:  http://www.autodesk.com/products/personal-design-and-creativity/apps