I think different games have a different chemical release in your brain as far as reward goes. I like making puzzle games, just because I know I'm kinda good at it, and they really are superfun to work on.
Games can be art, and they can be significant and all the glorified things that we want them to be. But if you ask a kid if their toys are important, they'll say 'yes,' and 'Please don't take them away.'
I'd been at Valve since I got out of college. I felt like I kind of grew up there, and I wanted to see what else was out in the world. One of the owners of Airtight Games is a friend of mine, and he asked if I would run a team there. It just sounded like a great opportunity.
Being young is an advantage. You've grown up with games as the dominant entertainment. You have a lot of experience of video games. So what do you want to see that's not been done? Innovation is really low cost for you. You can afford to take risks and fail to execute new ideas.
What's great about games in particular is that it's a socially acceptable way for adults to imagine.