Time and energy. I'm fortunate to have a day job that is challenging and engaging, and by the time I'm done with that for the day I usually just want to rechar

Time and energy. I'm fortunate to have a day job that is challenging and engaging, and by the time I'm done with that for the day I usually just want to recharge for the next day. If I'm feeling particularly energized I often end up staying later instead of going home to work on things. Plus, I have a list of non-coding projects competing for my time as well. Often if I do work on anything its one of those, because the context switch is easier for me and the problems are different than what I was just dealing with in the office.