Creating artwork with the iPad apps means that one can easily change small parts and then change it back to see the effect. For someone with obsessive tendencies, it can mean hours of fiddling. At times I have taken an old painting that had some parts I didn't like, put it into the iPad app, worked on it for hours, and then when I compare the two versions, I can hardly tell them apart. Finally, I'm left with the problem of having to decide which one is "the one." Here is an example.
Right now I'm thinking neither version is very good, or at least that my first one (on the left) is better. Apparently, I have discovered another way to increase self doubt. Oh well, at least I had fun!