Regarding the silver, it doesn't really show in pictures, but the Gen1 version of it is more metallic. They call it a liquid silver vs. sonic silver, I think. To be honest, I thought they were the same until I went for the drive, and, wait a sec.... I really like the older silver.
I've also changed my view on the Metallic Gray. It's hard to get good looks at these cars on the internet as the pictures get doctored and the gray, in a polished car ready for photos is amazing. But looking at some of the pictures on the road I think it'll get eaten alive by dust. I never took a close look at it on the lot, thinking I'd just get another silver. That red though.....
Actually, in photos the blues aren't too terrible. I had a coworker with the blue on a 2014 and I didn't like it but these look better than that. Maybe a memory issue, maybe they changed them a bit.