I've only read the last page of this thread but I'm very hyped, I love the options between eclipse and circle, 'draw from centre', etc.
I'm going to try and give some feedback but again I've only read the last page.
One of the things that turned me off of using one of the programs I tried, GraphicsGale, is that everything took up so much space.
I have a pretty big monitor and I don't like having to move my head to do everything, I like having everything right in front of me.
When I tried GraphicsGale everything was disorganized, the windows were everywhere, etc, and to be able to have all the windows in the one window, I had to maximize it.
I loved all the features when compared to MSPaint, but I stopped using it because of the simple options that MSPaint has, all you need to do what you're doing is on the interface and everything else is on the menu bar. I'd love to have a simple interface like that but more organized and with all the extra features that makes art easier to make.
Keep it simple stupid.
I'd also like to be able to have multiple files open at once, a feature I didn't see from the screenshots.
Also as for layers, I'd like to be able to have an 'animation mode' where the previous and next layer act like onion skins.
And to only have two colors selected at once, but to be able to set sets of two colors to be able to switch to with the scroll wheel. For example: If I'm making a little cute dragon maybe I want to be able to have two colors of peach for the belly and two colors of red for the rest of the body.