This is gonna be such a biased thread!!!
It's all personal taste but i reckon metalic and pearl have had their day and flat colours are making a comeback....so much nicer when they're polished....
You can't go wrong with red but remember it fades a lot in the sun, black is beautiful as The Bandit said, you can't go wrong with blue, green is classic and yellow is brave.....
Just pick something you'll be happy with, and I reckon you will be with any red
