For me it’s a joystick pointer. I’m just not used to trackpads, and I don’t like them anyway. I also couldn’t get used to trackball mice placed on the side of a laptop.
Second is inverted T cursor keys, meaning Up/Down keys the same size as Left/Right keys, so no HP or MSFT laptops for me.
I’d love more 3:2 or squarer display options, but I’m not holding my breath.