[MOD NOTE]I'd like to hear reason why you guys picked a specific color and why, maybe that will help me decide.
[MOD NOTE]
I merged your thread with the existing one.
As for reasons - its simple. I liked the space gray over the white. Just read through the thread and you will see its largely a personal preference.
Having said that, I don't think about the Siri lights much as I'm finding that I rarely even look at it when I'm interacting with it.