I actually liked the slightly darker haired Links, like the ones with more brunet or the dirty blondish hair color. I have nothing against the blonde hair color, however... I don't know... I just think that I like that hair more when its a little darker in color.
It's arguable but for me in Twilight Princess I thought Link was a dirty blonde, and in Skyward Sword I thought he was a light brunette.
I really don't care, but I guess it'd be nice to for Link to be a real brunette again like in the original Zelda games.
Even though I think Link looks best as a Blonde/Dirty Blonde, it really depends on the rest of the character design. Like WW Link is kiddish and happy looking and he is super blonde(almost yellow). TP Link is a little more epic and dark like he is super cool and determined and he is Dirty Blonde(honestly he is kinda brunette)
I think that it does depend on the atmosphere of that game, as in like Oot and MM it was a lot more childish looking, just more cartoony, and then you get TP where it is a very serious game, and Link looks much more grown up, but I like both versions really, just keep Toon Link blonde. c: