Light or dark? Eyebrows, that is

I have a rather shallow question: what is better, darker or lighter brows? It's a little dilemma I've been mulling about during random, space out moments. I recently acquired Benefit's popular Brow Zings Kit and I love it, but I am not too sure if I like the strong eyebrow look on me.

Using the Shu Uemura eyebrow pencil in Walnut Brown. It takes my eyebrows a shade lighter.

Benefit Brow Zings gives me sharper, manlier eyebrows

What do you think? How do you prefer to do your eyebrows?