At his talk last night, Chris said something like:
Nobody will ever care as much about your project as you do.
when talking about his labour of love: Infinite 8-bit Platformer.
My takeaway from his comment was that, when working on personal projects, your primary motivation needs to come from your own emotional investment.
Although other people may like your work, you can’t expect to be driven by the enthusiasm of others. Particularly not when the development cycle may span years.