Fabien Potencier makes the argument you should only be using personal GitHub Accounts for publishing a small snippet of code, a small demo, the code for a tutorial you wrote on your blog. Move any projects over to an organization.
An Open-Source project should not be tied too much to its creator; the creator just happens to be the first contributor. And for many projects, it will stay that way for a very long time, which is fine. But gradually, as more people contribute, it can confuse some users. The license you choose helps a lot and the way you are responding to pull requests and issues is also a great way to show you openness. But that’s not enough in the long term. Of course, understanding when it becomes a problem is up to you and definitely not easy. Here are some of my thoughts about some problems I identified in the past.