I have been coding for so long now that I can't have my keyboard any higher than my lap. I code with it resting directly on my legs. A mouse is right out. Any higher, and my hands turn to clubs.

I love emacs because I can do everything with the keyboard. It is faster and a lot easier on your body long term. My advice, start young. Keep your keyboard directly on your lap and use a ortholinear plank keyboard so your fingers don't have as far to travel. I was skeptical at first, but I will never go back.