I have chosen to use my domain rather than sticking with a sub-domain for a few reasons. My IM options were growing, and I wanted to reduce clutter in regards to that. In addition, I have multiple telephone numbers which will have respective pages for it. This makes things a little crowded with just a single sub-domain. With that in mind, I had decided to keep this domain, and renew it when it comes time, and reuse the domain for all of my contact details.