i'm sorry to interrupt, but i'm checking this brow convo and would like to give my 2 cents.
rbella's brows are very blonde, but aside that they look pretty much like mine and my mom's, in the sense of hair being sparse. it's hard to fill them without feeling there's something wrong there, imo.
i only fill them with an eyeshadow or mac's brow duo when i want a really dramatic look. if it's supposed to be neutral, i use the stud brow pencil (in my case) and draw tiny hairs where i feel it looks way too sparse. in the end, they still look subtle, but much much better than any other things i've tried.
i'd love to fill my brows with e/s, but it looks so fake on me