I have to ask, has there been much change in your personal life? Since meeting my soon to be wife I know that I have found it much more of a draw to spend time with her than to be coding all evening.
Also, I have found that it helps to be directed with your personal projects. Over the years (I've been working as a coder since 2000) I've started many things and not finished any. But now, as jnovek suggested, I am working with some friends and we are about to launch our commercial web project. All from a few months of evening work.
Like you, I lost some of the joy of personal coding and even though this recent project is not exactly something I have my heart in, my heart is in producing something I am proud of. That is spurring me on to finish so that I can get on with other personal projects on my own again.
Good luck.