You have to keep in mind it has a lot to do with the year(s) you're looking into. Choices are limited. In my case, I wanted a new one, and in 2001 it was either red, yellow, or sapphire blue.
Everybody has red, so that was immediately out.
I actually had a sapphire blue GTS with silver stripes on order, but I changed it to a yellow RT/10 after I saw one in person -- and took a ride in an RT/10 with the top off.
The other reason I didn't like the sapphire blue is because I knew I'd be driving the car a lot (I'm averaging nearly 18K miles per year on the Viper and I barely drive it compared to my other vehicles) and dark colors like that are hard to keep clean, and hard to keep looking good (swirlies). So I was already leery of it, even though I had one on order, when I saw a Racing Yellow version.
I guess I sometimes wish I'd gone for a bumblebee GTS, but man... summertime with that top off...