Sooo this is my list so far on what tools I've used and stuff I've done:
Pressure sensitivity, pen, e-pen, watercolour, airbrush, pencil, oval (lines & filled), rectangle (filled), rectangle erase, eraser freehand, eraser curve, copy, opacity adjustments for all tools, opacity adjustments on layers, dodge rectangle/oval, burn rectangle/oval, bezier, straight line, 8 layers, copy tool, 80% of the textures, freehand dodge, freehand burn, soft tool, flip y, flip x.