Any chance you can make one version for Windows?
I'm not interested in the selfie tool.
As well as having a bunch of useful tools for people working with screens, such as ruler, color picker, and a QR reader.
It can things I didn't know I would like to have :D
For example, I once needed to take a very precise crop off a screenshot, and thought "it would be nice if there was a way of fine tuning the mouse position". My first thought was somehow using the arrow keys, I pressed one of them and voila! The mouse moved a single pixel in that direction.
It's hard to pinpoint in specific features, but the best description is that ShareX is a very well laid out workshop, with everything within reach and nothing in the way.