what is more popular silver or black face plates

On tube, gear clearly black as it provides more contrast to the tube glow. For the rest, typically there is no choice. I may prefer silver slightly as dust is less visible on it. 

I find black keeps me in compliance with Death Star regulations.

I'm a silver faced guy myself, I mostly see other systems using silver,  I'm surprised by the all black comments just posted! 

I know it doesn't apply to all but silver has mid-fi vibes.

Silver, black faced gear is hard to see in a darkened room.