I'm with you on the paint affecting resale value. You've got to resale for resale value to be affected. If you don't plan to resale, who cares.
I live silver for the reasons mentioned, that's why I went for silver when buying my car. In my experience with silver, the problem is that it hates clear coat. I haven't seen many older factory silver vehicles that have the clear coat intact. At least not the Fords. The factory pain on the Kia is holding up pretty considering the neglect, but the areas that it was professionally repainted 10 years ago the clear coat is failing.
If the Kia gets repainted it'll go back silver, mostly due to resale value and factory color repaint is usually cheaper.
When the 99 Ranger gets repainted, it'll stay the factory Medium Peweter Metallic (or is it Dark Shadow Gray Metallic?) because I really like the color.
If the 85 Ranger gets repainted it'll probably be a dark blue metallic and silver two tone, or dark blue with silver stripe work. Or maybe a dark silver and light silver or white two tone.
The F-250 most likely won't get repainted. It's oxford white, and I think buying replacement used panels might be cheaper than paint. Oxford White Super Duty parts are everywhere.
The one I'm really torn on is the F-100. I'm unsure as to what color I want to go on it. Factory color would have been Rangoon Red. Current body is Royal Maroon and Wimbledon White deluxe two tone (maroon lower body & roof / white upper body), but most of it needs to be replaced. I'm torn between mixing the two with a Rangoon Red and Wimbledon White two tone (red body/white roof), or going custom with a burnt copper type color.
I've also thought about building a LBC (little british car), something like a MG-B or Locost Seven, and thinking green for that if I do. British Racing Green is common color for cars like that, but I think I'd mix it up a little bit with Ford's Highland Green.
So yeah, I'm not help on picking colors. I like too many, and can't afford to paint half of what I want to. If I ever get a shop built I might have to include provisions for a makeshift paint booth and learn to do it myself.