Really like the colours and the shading you did on the character.
Been using Krita for I feel like close to a year now. So far my only gripes with are is that most of the default brushes kinda suck (like why is the flow on most of these brushes cranked to the max?), and some of the tools kinda struggle when you have a huge canvas.
Haven't used any other art program (GIMP, Pencil2D, MSPaint, and Paint.Net don't count), so I can't really compare to anything.