Hey, I'm wierdo. I have quite a few sites, 9 I think now, but they're all subdomains. I need to take the risk of going for a domain. Anyways, hope it'll be fun!
Hello and welcome to DP. It is not such a big risk, try to start of with an cheap domain that you can find in the buy and sell forum here at DP. That is a good way to start.
Maybe you can tell us more about the kind of sites that you are running and we can advice for sure with some of our experience. Regards