In my experience, my ability to handle stress is already lowered considerably after work. Learning something new afterwards by trying implement a ToDo app or build something that might make money (in my case) can add stress.

Don't get me wrong, I've learned tons of new stuff and I really like it. It even comes with some benefits. But we can't ignore how stressful it can be pre-finished product. Usually the rush comes after it finally works.

Now add on top of that a wife who doesn't want me at a computer, but instead doing something with her. Honestly, during those times when that one piece just doesn't work right, I prefer to not be debugging too. Yes I have the option to walk away, but then it never get's finished.

My point, it makes sense why so many of us, even very talented ones, aren't cranking out apps in our spare time. We'd rather do something enjoyable for a change and have healthy relationships.

I applaud anyone who both manages to enjoy their job, excel at it and have someone that's cool with you doing that thing when you get home too.

I don't think my situation is different -- I did write that to do things right at work was such a sublime and motivating experience, that I did it with my free time... :-(