I agree. Minecraft wasn't a mainstream game at the time of its release, however, when Notch was working on it. It was an indie project (one that, admittedly, went viral) before it became what it is today.
Love it or hate it, it was born of creativity in an industry that, at the time, just wasn't even slightly interested in what it had to offer until after it broke convention and succeeded.
Or rather, what I should say is that Notch was able to express said creativity despite the industry he tried to work for consistently telling him "no"; after all, Minecraft itself didn't come until later down that road.