Speaking of weird habits...
When I was in college, my keyboard at home decided that it was going to stop working. Well, sort of. You see, some of the function keys at the top stopped working (like F11, and F12), but that wasn't that big of a deal. I never used those. But what was annoying was the shift keys stopped working - both of them.
So, to type a capital letter, I had hit the caps lock key, hit the letter I wanted, and then hit the caps lock key again.
DOS proved to be more of an annoyance. I no longer had easy access to *, ?, ", $, or any other shift-provoked symbol. So, in DOS, I learned the alt-numeric keypad fingering for most of them. So, if I needed an asterisk, I could go over and hit alt and then the number.
One day in the computer lab, my friend is standing there over my shoulder as we were working on something together, and he noticed that my caps lock key kept flashing off and on very rapidly. He asked why the caps lock key kept coming on. And I explained that I had to retrain myself to get capital letters that way, since my keyboard at home forced me to learn a new way. He thought I was the biggest dork ever.
I've since retrained myself to use shift keys instead nowadays.
