My missus likes the Alu roof bars for the look. Not sure black ones on black as we have now work looks wise ... But we have them purely to attach bars/box/sheds etc safely and very practical they are.
Shallow just for looks question.. Matter of taste!
Seems like your missus is the one blessed with taste...
I'm talking about cars here young man so don't start attaching pictures of yourself for attempted validation of the above comment...
God bless..