We make games that we want to play.
There's no market research, no focus group testing, to figure out what we want to make. We just have a passion for games, and we want to share our games with the world!
Since we like our own games, there's no reason for us to shove them out the door as quickly as possible - why would we make a sub-par game for ourselves?
The bottom line is this: we love our games, and we hope you will too!
Source: The Developer Website.