Well, I'm going to preach anyway. It's both stupid and totally unnecessary to run your entire system as root, particularly with an X-session. The administrator/user separation was designed for a reason, and not just for external security, but internal as well. It reduces the likelihood of you you screwing up your own system.
But anyway, it's your own funeral. Which distro are you using? On Debian you can edit the /etc/default/pulseaudio file, or use configure-debian if you have it installed. This controls the way the init script runs.
They also caution you against running pulse as root too, of course.