Sorry, no, I do not think that really thick eyebrows or uni-brows are attractive, especially on a woman. I like very nicely shaped eyebrows that people take care of them by plucking their brows with tweezers or those that wax their eyebrows into a pretty shape. Eyebrows can be a little bit thick, but not overly so to where they look like Chewbaca.
I can't tolerate the kind that are penciled-in when there are no eyebrows underneath (unless I know it is a cancer patient that has lost all of her hair, then yeah, that's different).
It is one thing to make your light colored eyebrows a little bit darker by shading them lightly with a pencil, but when a lady has eyebrows are heavily penciled over to make them really dark, I think they look super tacky.
To me. it is like so many actresses that have blond hair, but they have 2" of dark roots showing on their head and they have dark brown or black eyebrows. It looks cheap and like folks do not take pride in the way they look.
Bleah on the unibrows and heavy, thick eyebrows. It might look fine on a cyclops, but not a human being, whether it is a man or a woman. Sorry, this is just my honest opinion.