I don't like white fletch -- goes back to an incident with coon dogs along the Cahaba River in southern Alabama in 1975 with me wearing a hip quiver full of white-fletched arrows.
I used to like blue best because I can pick that color up better than most in the leaves. However, recent research shows that deer see blue better than we used to think.
I like shield 4" barred feathers in almost any color except blue or white. My favorite, when I can get them, are home-made from wild turkeys.