Trying out a different paint program today called Mischief. It was on sale for the weekend. It's pretty basic, with 4 different brushes, some papers and layers. The different thing about it is it's vector based, so you can export to any size. I like that. There are no layer blend options, only transparency. It's a great program especially if you have great digital painting skills and can get on without a lot of aids. The interface is simple, and hot keys are easy.
After a quick run on it, I think I will be using it quite a bit. Like most vector programs, the user might detect the brush stroke has the slightest lag when you apply quick circular strokes with large brushes.