I wish I could grow decent eyebrows. Mine are pathetic! I get the feeling that when I'm old I'm going to have to draw them on like an old woman!
Shave the brows? Hell no! I just completed transplants to have some. BTW it's the only transplant I would ever consider. As it is, I have about a 2 inch scar on the nape of my neck from it.
You only have one life, don't leave it with a bunch of what-ifs.