I switched to an Evoluent vertical mouse for its ergonomics, but the feature I like the most is the middle click button! It has 3 buttons for left, middle and r

I switched to an Evoluent vertical mouse for its ergonomics, but the feature I like the most is the middle click button! It has 3 buttons for left, middle and right click, a vertical scroll wheel and two navigation buttons for back and forward (that I never use). Find it really comfy to use in Blender and elsewhere.