It depends on face shape. For example, I have a diamond to oval face shape, so my brows are naturally arched. That doesn't mean they look like the ^ thingy.. Which it does for a lot of people. If you want to arch them you've also hot to have thick brows, or you'll end up with jist a line.
I might have a tiny bit of natural arches but... I felt like making them a bit more curved would look better so I do shape them a bit on a regular basis. I feel like it helps my face look not so washed-out, and bring my eyes out a bit?
Mine naturally arch but not like I want them to, so I define it and give them a little more. Yours seem to look great though. Mine are almost blonde so I have to fill them in too just so you can see them. It's annoying.
Mine are straight. I don't fill them in either. All natural lol, I have so much hair there. Guess it's my Lebanese genes? Lmfao. But anw, I don't like it when girls draw them. Natural is ALWAYS better.
I naturally have an arch on my eyebrows and I hate it. I wish I didn't have it, lol. I never fill in my brows, I don't want to make things worse for me. I already look like a villain with my dark arched brows. 😭