I wish that Sarah would go back to brunette to be honest, I thought she looked gorgeous when she went brunette again shortly after Buffy ended. IMO the super plantinum blonde she currently has isn't doing her any favours

And this will sound silly, but I always liked that they got a little brunette girl to play younger Buffy in Killed By Death, so I was a little bit disappointed that they got a super-blonde little girl for the flashbacks in season 5. Looking at the darker blonde in season 1 and then the really bleached blonde for season 2, there was no way to expect us to buy that Buffy had always had that golden-blonde hair colour that she had in season 5