I have resisted naming any of our vehicles because my in-laws named all their vehicles some really sappy names in my opinion. However, after having to purchase a new Silverado after our 99 Silverado was stolen and then totaled by the insurance company, the only Silverado/Sierra that matched our needs/desires was a red one. Not just any red, but what the factory unofficially calls "pull me over red".
Well, it suited me fine, but my wife, well, after 2 years she's still on the fence over the color and couple of other things (too much technology for her). Anyway, about a year ago I broke down and named the truck Hellboy after Ron Perlman's character in the movie franchise. For some reason I let it slip about month ago and my wife said she loves the name!