The mouse I have the fondest memories of was my first mouse.
Mouse on left below:
I don't recall mine being labeled Genius, but it might have been. It's been about 20 years...
These days my favorite is my Logitech G500 mouse. The shape and feel are perfect for me.
I have never been able to use alternative pointing devices effectively. Trackballs, touch pads, trackpoint joysticks, etc, None of them work for me. It has to be a mouse.