I also vote for drawing, and not just because I originally introduced it into the repository 🙂
Any time I just want to make some slight adjustments to an image (cropping, crudely drawing some arrow or circle, flipping, etc.) I use drawing
. Or if I want to make some crude drawing to demonstrate something to my friends.
For any more serious editing work I use GIMP. Not sure what the best software with a feature-level in-between those two would be.