This. I get to think about a bunch of different problems, some of them interesting, some of them difficult or impossible to solve, with a team of malcontents and nutballs. It's like being on a crew of pirates who stress about implementing k-d trees, matchmaking, deploying dedicated servers, build systems, scaling everything appropriately and doing it all as fast as possible. And at the end you ship something which is hopefully magical, possibly something that is shit, either way you have a giant party and tell awesome stories.