The best one I have used believe it or not is a no-name GE-based PS-2 Optical mouse. Second is my MacBook Trackpad (full trackpad is a button) and third is my Logitech Wireless Mouse. The Mighty Mouse comes in fourth and Trackballs come in fifth.
Don't get me wrong, trackballs are awesome, and I would prefer them over most PC Trackpads, but with the jitters my fingers get, it's hard for me to control them. I guess with a little motor-skill training I could master it. But currently, I have no trackballs that aren't ADB
BTW, I have an ADB Kensington 2-button Ball mouse. Awesome mouse, but the ball tracking SUCKS
Don't get me wrong, trackballs are awesome, and I would prefer them over most PC Trackpads, but with the jitters my fingers get, it's hard for me to control them. I guess with a little motor-skill training I could master it. But currently, I have no trackballs that aren't ADB
BTW, I have an ADB Kensington 2-button Ball mouse. Awesome mouse, but the ball tracking SUCKS