EcoGeoFemme has a new post up concerning the number of spaces you add after a period when typing.
I always used one space after typing. I didn't know that two spaces were a valid option, and not a mistake. So when I collaborated with someone who used two spaces (but not totally regularly, and occasionally up to four spaces), I was convinced that he was just a sloppy typist. I kept getting rid of the extra spaces I came across, and finally they annoyed me enough that I did a "replace all" to get rid of all of them. My co-author never said anything. He probably figured it wasn't worth getting into an argument for.
I'm a keyboard-pounder. My sweetie always teases me about it because I appear to be an angry typist, but it's really because I'm going too fast to be subtle about it. With my clunky keyboard at work, you can hear my typing clear across the office. I'm far too fast to be slowed down by an extra space between sentences...
So, are you a one space person? Two spaces? Or, God forbid, an erratic space person?