Actually I write in C,D or E because that is the limitation of the range I can sing in. And I like flatted keys because the black keys stand up off the keyboard and are easier to find when fishing blindfold for a key. As it is I have a small piece of duct tape on the A's so when I reach without looking I can find "home" by touch. Playing live with boards at 90 degrees to each other there is a lot of blind reaching.

But we are way off topic....