I don't know what I use. I seem to use my right thumb for tghe spacebar more than the left (which I still use often) but I seem to be hitting the spacebar with my right index finger, really. I shift whith my left pinky (and almost never usr the right shift) and backspace with my right ring finger (right next to the pinky). Oh, I just used the right shift button to put ) in. i guess I do use it for punctuation. Really, I just use whatever finger's closest.

And I, too, look at my keyboard, though it seems I don't really need to (writing this sentece has been relatively slow and I haven't needed to hit the backspace key much.

Too slow, though, and not nearly as accurate.