Paint.NET

http://www.getpaint.net/
Since I've got my new PC, I'm trying to modernize my software portfolio. Among them, the graphic wares are difficult to modernize. Indeed I know some free graphic wares including GIMP, Pixia, PictBear, ViX, IrfanView, Picasa and MS Paint (!), but they are either too complicated or too simple for my usage. It's like a selection between an ax and a razor to cut a melon.
Yesterday I tried Paint.NET and found it the best solution for both retouching photos and editing figure. Retouching photos includes gamma adjustment and fine rotation of whole image. Editing figures includes trimming and painting pixel by pixel. And the most important point is that Paint.NET has Windows-compliant user interface! It's really easy to find out how to do what I want to do!
One weakness of Paint.NET is that it has no capability of JPEG lossless rotaion. Does someone know a plugin or simple command-line tool to do it?