Every flashy new lighting effect shown on the Pyrosphere just has to be some tint of purple to send our minds racing, doesn't it...
Anyways, I had an idea the other day after browsing that one Miiverse pic compilation website. Battlefield is far and away the stage used most for pics, which makes sense because it's the default stage and is quite scenic. You know what else it is? Hazard-free, which makes it a whole lot easier to leisurely set up and take pics.
With that in mind, it's quite possible that the other stages we've seen quite often in pics, like Smashville, the Punch Out!! ring, Skyloft, and most importantly, the Pyrosphere, are hazard-free as well, and that's why Sakurai generally chooses from those stages for his daily pics. Intrusive hazards are also potentially why we don't see as much of stages like Dr. Wily's Castle. Thoughts?