One of the nicest things about drawing on an actual piece of paper, is having several pencils or paint colours next to eachother, that can be switched in seconds. In particular with pencils I personally tend to have the 5 or so colours that I need most in my drawing hand, and can mostly switch without taking my gaze off of the sheet of paper. In Sketchbook I find switching tools rather cumbersome, especially when using (for example) a blue brush at 50% opacity and a yellow one at 70% opacity. I use Sketchbook on an iPad, but have an iPhone as well. It'd be great if I could use my iPhone screen to access brush presets, especially different presets of a single tool, with one tap at the time. This would streamline the workflow tremendously, and increase accuracy when switching between custom colours.
Thanks for reading.
Kind regards, Izzy