Good Work Defined

What is work really? And when is work good? How about these definitions:

Work: An activity you engage in for some extrinsic purpose. You want the the fruits of your labor: The coconuts picked, the grain harvested, the wages earned, the social status obtained.

Play: An activity you engage in for its own sake. It carries intrinsic rewards. You do it because it's fun.

Good work: When your work contains 100% play. It's fun to do.