I'm finally reading Free Play again. Always a pleasure.

I've also been pair programming a lot. Another pleasure:

"Some jobs are too big to handle alone, or simply more fun when done with friends. Either case leads us into the fruitful and challenging field of collaboration. Artists working together play out yet another aspect of the power of limits. There is another personality and style to pull with and push against. Each collaborator brings to the work a different set of strengths and resistances. We provide both irritation and inspiration for each other - the grist for each other's pearl making.

We need to remind ourselves here of what is obviously true but not often enough said: that different personality styles have different creative styles. There is no one idea of creativity that can describe it all. Therefore, in collaborating with others we round up, as in any relationship, an enlarged self, a more versatile creativity."

I could quote the whole chapter but hey, do yourself a favor and get the book.