I actually thought about this quite a bit before I decided to just use my name. I normally go by a Forum name I’ve used over at previous websites, but I also used to separate my identity as someone who likes video games and the rest of myself because I was insecure about it. I’ve grown out of that now.
As others have said, we used to be told not to share personal information like your name on the internet, but now we have Twitter and Facebook and so forth, it feels a bit redundant.
I have a blog, a Twitter account, I used to write about games in a small capacity a few years ago. My name is already out there, so that’s why I settled on using it here. I suppose in a way it also keeps me accountable for the things I say.