What motivates us

My manager sent me the link to this video today, the message of the talk was something I've felt personally for a while but it's good to see research back it up. It's why I code at evenings & weekends on my little side projects such as Twitile.  The visualisation of the message is also quite unique.

The author also has a book out on the subject called Drive: The Surprising Truth About What Motivates Us