I guess some of it probably boils down to what type of work you're doing. I do a lot of hand coding, but there are also plenty of CTRL-this, CTRL-that combinations. Plus, I've got all the grace and coordination of a rhino. My fingers keep getting in the way of my other fingers...

I agree about the Microsoft mice. They're okay, but once I tried Logitech I knew I was home.

M22ti mains, EP175 sub, VP150 center, QS4 surrounds