I am a man that likes his privacy. However, I also do not want to pay for private listing with the WHOIS on my domains. Because of this, I have chosen to acquire a PO Box. This box is listed as the administrative, billing, and technical address for all of my domains. I simply pay $120/year, and have the privacy I want. This address is given as my primary address for all postal communications which means no one has to know my residential address. This will be especially useful for when I move and want fewer people to know where I live.