If you LOVE something - you do it in your "spare" time. That was the core of my point. I will take a dentist, butcher, developer who LOVES their work in such a way that the line between work and fun is blurred over someone who is working for the weekend - any day!
You can be a fine developer who just clocks in and out. But if I had a choice (and sometime I don't). I would choose the guy who loves what they do and does it in their "spare" time.