I have many. I have changed the note durations on the keypad to 1=whole, 2=half, 4=quarter, etc. +=sharp, -=flat, *=natural. F10/11 switches between page and gallery view.
I use Keyboard Maestro for items such as: F18=Copy, F19=Paste.
In short, I’m left handed which works well as I use the mouse with my left which leaves the keypad for my right. I’ve changed the most used shortcuts so they can be operated using the right side of the keyboard.