I shave every 3rd or 4th day, when my stubble starts to annoy me. For one, I just don't have the time--too much else I'd rather be (or need to be) doing. Also, I enjoy looking a little different from one day to the next. Lastly, I'm afraid I'd find it something of a chore if I did it every day. 2x a week keeps the experience fresh for me.