When I learned AutoCAD there were no tool bars, and it was on dos. If you wanted short cuts you had to make your own modified pgp file and load it on the machine. When toolbars came I tried them but didnt realy care for them.
Back when I used to tutor people learning cad if one of their tool bars or buttons was missing it was like they were dead in the water, as they got used to just clicking a button. The good thing about using the keyboard I feel is that it really forces you to pay attention to the command line and thus how the commands them self function and what they ask you for. I would always tell the students that you should try and learn the commands as much as possible on the command line/keybord first and then migrate to toolbars as you need them.
For me personally I dont get the guys who have their screens full of toolbars. For one thing I can never remember what each little buttons image is and what command it represents. Also depending on how big your monitor is and how bad your eyes are it can be a little difficult looking at all those buttons. Secondly when your screen is cluttered with so many toolbars you have much less screen available and seemingly have to keep zooming and paning all the time. Not my cup of tea.