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I really like the Wacom Pen Drawing Tablet. There is a learning curve though. And it takes getting used to the way it reacts. However, it seems to be helping my back and neck some, with is all I wanted.
One of the aspects of abstract art I most enjoy is that most pieces are multi-directional. That is, they can hang vertically or horizontally and there is no right-side up or upside-down. Each way offers a different look.