Haven't used AutoCAD in anger for a while, but my default rest position on the keyboard is still fingers over Esc, thumb over space. I always preferred using the command line. Not out of some 'power user' power trip, but more for screen space and efficiency. Being able to use AutoLISP was pretty neat too.
I came in during the "toolbar" era, but ended up using the command line quite a bit. It was custom ACAD macros, and then AutoLISP, that got me back into programming after a long hiatus.
