I was on the fence as I have always had silver (coming from 2015 15") and would typically prefer the darker option, but I was reading that the contrasting keyboard and logo makes the silver option a lot more appealing this time around.
I sprung for a silver 16" and am really happy with it. I watched a movie in pitch darkness and the 'shininess' didn't bother me at all. The silver looks better to me in really bright environments, too. I think the space grey looks too warm. I could barely tell it was space grey at all when I saw them at Best Buy.
I hope Apple comes out with like a slate grey or that new midnight color in the future.