Co-founder and chief game designer, PopCap
I could say that it’s the most efficient way I know to convert my own time and effort into improvements for the world at large in the form of entertainment and pleasure for our players. But while I believe that to be true, and to justify my work, it’s not really why I make games.
The real reason is more selfish: I need to create things. I start to feel ill if I’m not working on a project of some sort. I love games, so it’s fortunate I’m in a position where I can fulfil that need by building them as well.