I must ask: how many people actually use the right shift key when typing? I have grown accustomed to only using my left and was wondering if others shared this behavior.
I touch-type, so I alternate left and right depending on which letter I have to capitalise, i.e. I tend to use right shift for left-hand letters and left shift for right-hand letters. Except that being right-handed means I favour the right shift and use it also for letters typed with the right index finger.
I use both shift keys. Left shift key when the other key I need to press is on the right side of the keyboard, and so on. I also use both of my thumbs to press the spacebar.